Product Name: E53 Dawn sound in-car AUX wireless receiver
Size: 50 * 48 * 11.5mm
Weight: 12.6g
Features: 
145mAh battery for 10 hours of music and calls
Application:
1. BT specification: BT V5.0 JL.
2. Transmission range: 10 meters.
3. Charging voltage: DC 5V. Charging time: about 2 hours.
4. Calls/music time: 10 hours.
5. Standby time: more than 200 hours.
6. Output interface: 3.5mm.
7. 145mAh A-grade polymer battery.