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【Voltage Compatibility】
When using electrical appliances, please note that they are designed for Japanese voltage specifications (90-110V), so if you use them with a different voltage, it may cause a malfunction.
【Plug Type】
Our products use Japanese plug types (A or B type).
Please use a conversion adapter if necessary.
【Important Note on Transformers and Adapters】
A transformer adjusts voltage to match your device’s requirements.
A conversion adapter only changes the plug shape and does not adjust voltage.
Using only a conversion adapter without a transformer may result in damage to the product.
【Liability】
We are not responsible for malfunctions or damages caused by improper use, such as operating the product without a transformer.
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[Bluetooth 5.3, Ultra-Stable & Low Latency Connection] Equipped with the latest Bluetooth 5.3 technology, these headphones offer even more stable connection and faster data transfer speeds than previous models. They offer less interruption even in crowded environments like the commuter train or the gym, and significantly reduce audio lag when gaming or watching videos. Enjoy wireless freedom with a reliable, comfortable connection.
Simply unpack and power on the headphones, and they'll automatically pair with your smartphone or tablet (initial setup). No complicated setup is required. They also support multi-point Bluetooth, which allows you to connect to two devices simultaneously (e.g., smartphone and PC, or smartphone and tablet). Switching between phone and music, or work and personal devices, eliminates the need for tedious pairing procedures. When you receive a call, the headphones automatically switch, and you can smoothly return to your original music or video playback after the call ends.
[Ultra-lightweight design & compact storage, easy to carry anywhere] The extremely lightweight design (approximately 25g) is so light you'll forget you're wearing it around your neck. The flexible cable and ergonomic shape reduce strain on your neck and ears even during extended use. After use, the headphones can be easily folded and stored compactly. Store them neatly in the included pouch and easily fit in your bag or pocket, making them ideal for business trips, travel, and everyday use.
[Up to 15 Hours of Playback & Type-C Fast Charging] Thanks to its large capacity, you can enjoy up to 15 hours of continuous use on a single charge. Ideal for long-distance travel or those who want to enjoy music all day. Furthermore, it features the latest USB Type-C charging port, so a full charge is completed in a short time.
[High-quality Hi-Fi drivers reproduce the essence of music with clarity] Equipped with precision-tuned, high-quality driver units, these headphones deliver high-resolution Hi-Fi sound, faithfully reproducing the subtle nuances and realism of music, from delicate highs to deep lows. Noise-canceling (if available) and excellent sound insulation (the tight seal of the earplugs) allow for a more immersive listening experience.
Intuitive Operation & Easy-to-Use Button Layout: The neckband features a clear and intuitive button layout. Easily perform key operations with a single touch, including volume adjustment, skip forward/backward, play/pause, and answer/end calls. Operation sounds and voice guidance (in supported languages) provide feedback, allowing you to operate the headphones safely without taking your eyes off the controls.
[Reliable Japanese Support & Comprehensive After-Sales Service] We provide Japanese manuals and customer support so you can use the product with peace of mind even after purchase. We will respond promptly and courteously to any questions or problems you may have about the product. The manufacturer's warranty (1 year) also applies, and we have a reliable after-sales service system in Japan. We are committed to quality and customer satisfaction.
Product Specifications Wireless Standard: Wireless Version 5.3 Supported Bluetooth Protocols: A2DP/AVRCP/AVDTP/SPP/SDP Operating Frequency Band: 2.402GHz-2.480GHz Receiving Sensitivity (Typical): -94dBm Communication Distance: Up to 10 meters (Unobstructed Environment) Speaker Output: Rating 2-5mW S/N Ratio: ≥92dB Frequency Response: 50Hz-20KHz Built-in: 3.7V/120mAh Lithium-ion Charging Input: DC5V TYPE-C USB Charging Time: Approximately 1.5 hours (0% to 100%) How to Power On: Press and hold the power button for approximately 3 seconds → The LED will flash red and blue and the device will enter automatic reconnection mode (if there is no connection history, it will enter pairing mode after 5 seconds) Power Off: 1. Press and hold the power button for 3 seconds → The LED will flash red and blue and the device will enter automatic reconnection mode (if there is no connection history, it will enter pairing mode after 5 seconds)
2. If the device is out of range and not connected for 3 minutes, it will automatically turn off. Start-up volume: Default is maximum volume Answer call: Click the power button once → Voice guidance available End call: Click the power button once Reject call: Press and hold the power button for 2 seconds Redial last number: Double-click the power button while connected or playing music Volume up (+): Short press the volume up button Volume down (-): Short press the volume down button Pause/play: Click the power button once Switch to previous song: Long press the volume down button during playback Switch to next song: Long press the volume up button during playback Safety precautions 1. Charger selection - Use a charger with an output of 1A or less 2. What to do after charging is complete - Immediately disconnect the power after full charge 3. Do not use a mobile phone Never use a mobile phone to charge this product LED indicator status explanation 1. During pairing: Red and blue LED flashes alternately 2. Pairing successful: Blue LED flashes slowly 3. Charging: Red LED stays on 4. Charging complete: Red LED turns off, Blue LED stays on Smartphone connection procedure 1. Preparation: Connect the earphones and smartphone
Place the smartphone within 1m (close proximity recommended) 2. Start pairing mode: Press and hold the multi-function button until it flashes red and blue 3. Execute connection: Turn on Bluetooth on your smartphone → Search and select the device "I27" Connect without a password → Blue LED flashes when successful Multi-point connection settings 1. Initial settings Press and hold the multi-function button until it flashes red and blue (start pairing mode) 2. Connecting the first device Turn on Bluetooth on smartphone 1 → Connect "I27" 3. Prepare to switch connections Turn off Bluetooth on smartphone 1 → Press and hold the multi-function button to turn off the earphones 4. Connecting the second device Press and hold the multi-function button again until it flashes red and blue → Press and hold the multi-function button on smartphone 2 again until it flashes red and blue → Connect in the same way on smartphone 2 5. Operation on smartphone 2 Switch on the Bluetooth function of smartphone 2 Search for "earphones (model number: I27)" from the device list Tap the detected device name to connect 6. Reconnecting the first device Turn off the Bluetooth function of smartphone 1
Troubleshooting [Problem 1] Cannot find earphones on device Cause: 1. Earphones are powered off 2. Internal system error on earphones 3. Malfunction in smartphone Bluetooth settings Solution: 1. Force pairing mode Power off the earphones → Press and hold the multi-function button until the red and blue LEDs flash alternately (approximately 5 seconds) 2. Reset the device Restart the smartphone → Delete all existing connection history Important note Pairing time limit Complete connection within 2 minutes in pairing mode
3. Maintain communication range Keep earphones and device within 10 meters (recommended environment without obstacles) [Problem 3] Red LED does not light up while charging Cause Deep discharge due to long-term non-use Solution 1. Emergency charging - Charge continuously for 30 minutes with genuine USB Type-C cable → Check that red LED is lit 2. Safety precautions To prevent overcharging, turn off the power immediately after full charge. Never charge/store in high temperature environments (above 40°C) (causes battery deterioration) Important operation precautions Operation restrictions while connected Refrain from operating other buttons while connected to Bluetooth Maintain communication quality Keep device within 10 meters of earphones when talking/playing music
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