1. Material: plastic + silicone jacket
2. IPX4 waterproof
3. Built-in 1200mAh battery
4. Bicycle speaker, can be placed on the bicycle bottle holder
5. Built-in MIC, can answer calls
6. Double diaphragm to enhance bass effect
7. Power supply: built-in lithium battery
8. Power: 3W x 2, Stereo
9. Bluetooth solution: Jerry 4.2
10. Audio input: wireless + wired audio input
11. Connection distance: Barrier-free 20 meters
12. Playing time: about 8 hours