Product Name:Bluetooth-compatible HandsetWorking voltage: DC 4V;Battery capacity: 200mAH;Communication time: 12 hours;Standby time: 36 hours;Charger: DC 5V, 300mA;Frequency: 2404-2479MHZ;Communication distance: barrier-free 10M;Charging time: 2 hours;Introduction:1. Start the power supply: when using Bluetooth-compatible, press and hold the function key until the blue and red lights are on at the same time and flashing;2. Bluetooth-compatible pairing: a. Start the Bluetooth-compatible function of the mobile phone; b. Turn on the Bluetooth-compatible search function; c. Search for the NFXSL model, select the model, and then the blue light flashes to indicate that the pairing is successful;3. Answer the call: When the phone calls, the phone will still ring the ringtone, at this time press the function key of the Bluetooth-compatible handset to answer the call;4. End the call: After the call is completed, press the function key of the Bluetooth-compatible handset to end the call;5. Reject the call: when the phone calls, press and hold the function key for two seconds, and release it to reject the call;6. Redial: redial the last call, double-click the function key or long press the function key for two seconds to realize the redial function;7. Power off: press and hold the function key until the red light is on, that is, power off;8. Charging: The indicator light of the earphone will show a red light when charging. When the earphone is fully charged, the red light will turn off and the blue light will be on for a long time. The first charging time is about 4 hours;Packing list:1 x Bluetooth-compatible handset1 x USB charging cable1 x packing boxNote:1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding.2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.