1. Digital code transmitter-receiver system2. 25 optional melody3. Waterproof transmitter4. Easy installation without need of wire5. Transmission range up to 50m6. Transmitter Power: DC-12V7. Receiver: AC power8. Size:. Receiver: 9.7 x 5 x 2.3cm. Transmitter: 7.7 x 3.9 x 1.5cm9. Material: ABS
