4 Channel RF Wireless ON/OFF Smart Switch with RF Remote ControlA Four channel relay board with a wireless RF interface that can be controlled by a wireless remote. The relays can regulate 250 V 10A appliances, motors, and other electrical circuits, etc. When the remote is in line of sight, the board has a range of 100 meters and roughly 25 meters indoors. This board's RF connection operates at a frequency of 433MHz. Both the transmitter and the receiver have an inbuilt antenna and are easy to use. Receiver

Remote Controllers

you can refer to A7800 Datasheet

and USART communication

the design is of metallic mesh case which enhances the heat dissipation of RQ-50D that the whole series operates from -25°C through +70°C

Protections: Short circuit/ Overload / Over voltage

Maximum Supply Voltage 45V Saturation Voltage 1

8 g  Temperature Range  -30 - +70 °C Diameter 20 mm Height 3

High speed (tf=100ns typ)

Model KBP310

The 150K SMD Resistor is a conventional thick film chip resistor and is a type of surface-mount resistor

The control chip integrated into LED above becoming more simple circuit

Peak Repetitive Reverse Voltage 1000V Max