Self-generating Mobile Phone Remote Control Home Wireless WiFi Doorbell $ 24.50 Product information: Transmitter size: Platinum 67 * 19mm Frequency: 433.92MHz Outdoor distance: about 50m Transmit power: 10dBm Operating Force: About 700g Receiver size: Platinum 68 * 31mm Host power supply 110- 240VAC Packing list: Transmitter X1, receiver X1 / Transmitter X1, receiver X2 Product Image:
