1. Material: ABS, electronic components 2. Power supply mode: AC 3. Power supply voltage: 110/220 (V) 4. Receiver: with indicator light, button, and light on 5. Transmitter: 12V 23A battery (delivered with battery) 6. Music selection: 60 music 7. Volume selection: 5 levels of volume adjustment 8. Power consumption: 1 (W) 9. Scope of application: 300 meters 10. Dimensions: Transmitter: 7.2 x 4.6 x 2.1 cm, Receiver: 9.3 x 6.2 x 3.2 cm