Feature:3.Using wireless encoding technique, no direction, no mutual interference.4.Default mode is interlocked,it's convenient to use for unisex child,adults at any age.5.220V 2 channel of output, three working modes, Inching Mode,Self-lock Mode,Interlocked Mode.6.Can be applied to remote control of the on and off of pump,LED lights,garage door, electric gate, electric motor, machine-tool,alarm system and other civil and industrial supporting remote areas.Specifications:1.Material:Metal & ABS2.Color:Black & White3.Brand name: BQLZR4.Transmitter Size:86mm x 65mm x 12mm/3.38in x 2.56in x 0.47in(LxWxH)Receiver Size:74mm x 54mm x 28mm/2.91in x 2.12in x 1.10in(LxWxH)5.Weight:105 gNote:1.When you choose the interlock mode,because the quantity of the buttons on the transmittter is the same as the relays, there will be always a relay stay ON. If you want to turn off the last relay, please turn off the power.2.The receivers in our store are mainly used together with the related transmitter in our company. If you want to use your own transmitter, please confirm if the operating frequency, chip type and vibration resistance of your transmitter are in accordance with ours. If not, they will fail to be linked to. If you want to order the related the,we have unique transmitter as well.Package Includes:1x Transmitter (Battery is not included)1x Receiver1x Screwdriver1x Cable1x Case