Dear customer, Thank you for choosing our products. If there is any problem with our products, please contact us through the order information. We will be happy to serve you and solve it for you as soon as possible within 12 hours, thank you Long wireless working distance by using the most advanced technology, remote control distance can reach 20~80m / 65.6~262.4ft in the open area. Quickly respond and send out signal to the mating unit for easy control when you press the button. low power design. battery life is long. compact and pretty, it is easy to use. Brand new and RF wireless remote control 1 channel mini transmitter for intelligent home with the advantage of simple matching, it's safe and reliable for the modification of ancillary products. Widely used in remote control switch, remote control garage door, remote control electric shutter, alarm unit, industrial control products, etc.