Feature: 1. SCOPE OF APPLICATION: 8 channel relay can be used for industrial automation, agricultural automation and home automation, such as factories, houses, farms, ranches, vehicles, ships, marine operations, flying machines, live calls, etc. 2. REMOTE CONTROL: 8 channel relay module can remotely control various devices such as remote control lights, sirens, locks, motors, fans, linear actuators, solenoid valves, security alarms, commercial signs, etc. For equipment on land and water. 3. EASY INSTALLATION: 8 channel relay board is wireless control and easy to install. Wireless RF signals can pass through wall, floors, doors or window. You can use two or more units in the same place, satisfy your various needs. 4. STABLE PERFORMANCE: 8CH 10A relay features high confidentiality, stable performance, low power consumption, and can be jumpered or dipswitch coded. One or more transmitters can control one or more receivers at the same time. 5. REMOTE CONTROL ON OR OFF: You can use the transmitter (remote control) to turn the receiver on or off from anywhere within a dependable distance. The receiver only works with transmitters that use the same code. 6. CONTROL DC OR AC DEVICES: Relay can control DC or AC devices. The range of the hand held transmitter is within an open area of 100‑150m. Structure, interference radiation and interference field will reduce the range. Specification: Item Type: 8 Channel Relay Material: ABS Working Voltage: DC12V-36V Current: Standby Less Than 10mA Working Temperature: -40℃, 80℃ Receiver Frequency: 433MHZ Receiving Sensitivity: -105dBm Communication Distance: Approx. 100-150m / 328.1-492.1ft Maximum Load: 10A Relay, Resistive Load Less Than 8A, Inductive Load Less Than 3A Remote Control Battery: 1 x 23A Battery (Not Included). Package List: 1 x 8 Channel Relay 1 x Remote Control Note: 1. Learning mode and steps1. Press the learning button of the receiver, the buzzer keeps beeping to indicate the learning state.2. Press the Relative button of the transmitter to learn the relative output mode, when the buzzer beeps "Be Be Be" 3 times to indicate successful learning, then press the transmitter button to hear the sound of relay action. If you do not have any operating within 32 seconds, the receiver will automatically exit the learning state.2. Delete the memory information (the code must be cleared before learning different buttons)Press and hold the learning button of the receiver, the buzzer will beep and emit "Be Be Be Be" (please don't wait for Be Be 6 sounds) and then release the button to indicate the success of deleting the memory information.