Description: brand new and high quality Feature: Super small body, and it occupies less space. Convenient to use. Used with the remote control can form a complete set of wireless intelligent remote control system. Adjustable working way, control equipment turn/reverse, on/off. Switch Self-lock, Jog, Inter-lock. Stable and reliable performance, high receive sensitivity. Easy and convenient to use, very practical and useful. Mainly used in electric door, window, lifting equipment, gate, elevator and other industrial control and security fields. Specifications: Item Type: Wireless Receiver Working Voltage: DC24V Channel: 4CH Material: ABS+Metal Size: 75x54x28mm/2.9x2.1x1.1in Color: As shown Optional Type: 1xremote control, 2xremote control Output State: Switching Value Encoding Type: Learning Code Quantity: 1 Set Instructions: Learning Method: Input DC24V Power for the receiver,press the learning button ,Green LED indicator OFF,Then press transmitter ,the LED indicator flash fast,It mean learning successfully. Clearing Code: Keeping press the learning button 8 seconds until the LED indicator ON, It mean the code have been cleared successfully. Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x Wireless Mini Switch Relay Receiver 1/2 x Remote Control