1. IP68 waterproof grade, can be exposed to the sun and rain
2. Waterproof, dustproof and shockproof, sturdy and beautiful body
3. The transmitter self-generating design, no battery is required, energy saving and environmental protection
4. The transmitter can be pressed around, easy to use
5. 4-level volume adjustable, 58 songs can be replaced
6. Volume range: 0-150dB
7. Power supply mode: transmitter self-generating design, receiver in-line
8. Frequency: 433.92MHz
9. Transmission distance: about 180m without interference
10. Dimensions: transmitter about 6.2 x 2cm, receiver about 9 x 2.3cm