Product Name:Bluetooth-compatible Handset Working 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 handset 1 x USB charging cable 1 x packing box Note: 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.