12v 4ch Channel 443mhz Relay Switch Long Distance Wireless Rf Remote Control With 2 Receivers For Alarm Systems

Description: Name: Relay Switch Receiving frequency 443.92MHz Receive sensitivity 105dB Maximum load current 20A Long distance 30M Working voltage DC 12V Frequency 315MHz Working current 13 mAh Features: 1. Signals can pass through walls, floors and doors, stably controlling the receiver anywhere within a reliable distance.  2. Security Control: The learning code has high security, low repetition rate, re-learning mode, when the remote control is lost, the old code can be deleted, and the new code can be re-learned, so that you can always control it. Packing list: 2 x Remote Control  1 x Relay Switch Note: Different displays may cause the color of the item in the picture a little different from the real thing.  Manual measuring,please allow 1~3mm error,thank you.