Retro mobile phone supports internal any bluetooth mobile phone, notebook bluetooth.

Features:
Support Bluetooth 5.0, support listening to songs, support HFPV1.5 and HSPV1.1, office appearance, with usb handset.

Technical parameter:
*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: 4 hours

Steps for usage:
1. Start the power supply: When using Bluetooth, press and hold the function key until the blue and red lights are on at the same time and flashing.
2. Bluetooth pairing:
a Start the Bluetooth function of the mobile phone;
b. Turn on the Bluetooth search function;
c. Search for the NFXSL model, select the model, and then the blue light flashes, the pairing is successful.
3. Answer the call: When the phone calls, the phone will still ring the ringtone, press the function key at this time to answer the call.
4. End the call: After the call is finished, press the function key 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 achieve the redial function.
7. Power off: press and hold the function key until the red light is on, that is, power off.
8. The indicator light of the earphone shows a red light when charging. When the earphone is fully charged, the red light will turn off and the blue light will be on. The first charging time is about 4 hours.