Technical Specifications:
Wireless standard: 5.0
Transmission distance: 10 meters
Output power: 5W
Play time: 4H
Frequency effect: 100Hz ~ 10KHz
Speaker : 57mm, 4Ω 5W
Input Power: DC5V, 500mA  
Maximum current consumption: 1A
Battery type: 18650 Li-ion 1500mAh
Audio signal input interface: standard Φ3.5mm headphone jack (stereo)

Features:
1. Wireless connection
2. MP3 Player for USB and MicroSD card
3. Support U disk/ TF card/ AUX play mode
4. Built-in lithium battery
5. Hands-free function
6. Support MP3/WAV/WMA/FLAC/APE music format
7. Use high-fidelity speakers, make the sound more natural and delicate
8. 1+1 serial function
9. Water resistance level: IPX6
10. FM Function