Description: Good compatibility: This bluetooth-compatible phone headset is compatible with most bluetooth enabled smartphones and has a wide range of applications. Easy to use: This bluetooth-compatible smartphone headphone is designed to be wireless, which is easy to use and convenient to use. Vintage design: This smartphone call receiver is designed in a retro style, perfect for your home decor. Widely used: Smartphone call receiver also supports listening to music, the retro mobile phone wireless handset is very suitable for parties, daily use, etc. Portable: Smartphone call receiver is small size and light weight, and this retro smartphone phone is easy to carry around. Specification: Bluetooth-compatible: 5.0. Working voltage: DC 4V. Battery capacity: 200mAH Communication time: 12 hours. Standby time: 36 hours. Charger: DC 5V, 300mA. Frequency: 2404-2479MHZ. Communication distance: 10M barrier-free. Charging time: 4 hours. Size: Approx. 23.7x8.5x6 cm/9.33x3.35x2.36 inch. Color: black, white. Steps for usage: 1. Power on: When using Bluetooth-compatible, press and hold the function key until the blue light is on 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 the blue light flashes to indicate successful pairing. 3. Answer the call: When the phone calls, the phone will still ring. At this point, press the Bluetooth-compatible handset function key to answer the call. 4. End the call: After the call is over, press the Bluetooth-compatible handset function key to end the call. 5. Reject the call: When there is an incoming call, press and hold the function key for two seconds and release it to reject the call. 6. Redial: To redial the last call, double-click the function key or press and hold the function key for two seconds to realize the redial function. Note: There might be a bit color distortions due to different computer resolutions. There might be a slight errors due to different hand measurement. Package Includes: 1 Piece Phone Handset(with 1 Piece Charging Cable, 1 Piece Instruction manual in English and Chinese).