Features: 1. The waterproof design of the transmitter effectively extends the lifespan of the product, ensuring safety and reliability. 2. The receiver offers 36 chord music options, adjustable across 4 levels. 3. Long-distance, unobstructed penetration of up to 300m enhances your experience. Product parameters: 1. Material: ABS, electronic components 2. Power supply mode: AC 3. Power supply voltage: 110/220 (V) 4. Receiver: features an indicator light, button, and light activation 5. Transmitter: powered by 12V 23A battery x 1 (battery included) 6. Music selection: 36 tracks 7. Volume selection: 4 levels of volume adjustment 8. Power consumption: 1 (W) 9. Effective range: 300m 10. Dimensions: Transmitter: 7.6 x 4.6 x 2 cm, Receiver: 9.1 x 5.9 x 2.5 cm