Feature: 3.1257 module chips, learning code encode, a good replacement for your current remote controllers.4.4Channals, 16mA operating current, 433MHz Frequency5.Widely used in Vehicle central locking systems, Garage doors, Electronic gates, Electrical appliances, Car sunroofs, Heating systems6.Before buying,please confirm if the operating frequency, chip type and vibration resistance of your transmitter are in accordance with ours.Note:1)The host must be 433 frequencies and 1527 chips, then the remote control could work with it. Any other chip and frequency is unuseful for this remote control.2)Learning:1. jog, interlocking, self-locking switch mode: press and hold the learn button two or three seconds, then the light starts flashing,Flash once and release the button: work to jogFlash twice and release the button: work is self-locking.Flash three times and release the button: work as an interlock.2, jog, interlocking, self-locking work:Jog: Press and hold the button to work, release the button to stop working.Self-locking: Press the button to work, press the button again to stop working.Interlock: Press the first button to work, press the second button to stop working.Specifications:Material:Metal+PlasticColor:BlackBrand name: BQLZREncoding: Learning codeOperating Current: 16mAModulation: OOK (AM)Channels: 4 Frequency: 433MHz Remote operate battery: 12V 27A(not include)Dimensions: approx. 2.16 x 1.18 inchWeight: 155Package include:5 x Wireless Remote Controls