ITEM NAME:Wireless Remote Control Switch AC 220V 30A 1CH Relay Transmitter and Receiver Description: Working frequency: 433MHz Working Voltage: AC 220V Channel: 1CH Relay: 30A Button: single Material: electronic components Switch Size: approx. 90 x 40 x 11mm/3.5 x 1.6 x 0.4inch Recevier Size: approx. 70 x 55 x 25MM/2.8 x 2 x 0.98inch Antenna Length (adjustable): Max. 195mm; Min. 14mm Package Includes: 1 Piece Remote Control Switch 1 Piece Receiver Module Note: Due to the quality differentiation of monitors and lighting effect, the picture may not reflect 100% the actual color of the item Please allow 1-3mm error due to manual measurement..Channel: 1CH. Relay: 30A. Antenna Length (adjustable): Max. 195mm; Min. 1 Piece Receiver Module. Switch Size: approx.