Specification:

Remote control:

Operating voltage: DC 12V(27A / 12V battery x 1)
Operating current: 10mA at 12V
Radiated power: 10mW at 12V
Transmission distance: 50m – 100m (open field, the receiver sensitivity of -100dbm)
Transmitting frequency: 315MHZ
Modulation mode: ASK (Amplitude Modulation)
Encoder types: fixed code

Decoding receiver board:

Operating voltage: DC 5V
Receiver sensitivity is -98dB
Leg 7 bits: VT, D3, D2, D1, D0, +5V and GND
VT is a valid signal high output pin upon receiving a valid signal, the pin output high, may also drive the relay
Size: 6.6 x 22 x 41mm

Note:

There are four buttons on the remote control, and respectively correspond to the four data bits to the receiving board output pin D0, D1, D2, and D3.
Press the buttons transmit signals, the corresponding data bit is output high.

Package included:

1 x Remote control
1 x Decoding receiver board