Features: A great replacement for door open button or other switches of devices, widely used in elevating controller, automobile, household appliances, machine tools, alarm system and other automatic Controls area. automatic Switches for automatic regulation, with selflock function, allows safety protections and circuit conversion. ensure sensitive and strong signal receiving and transmission. plastic materials and professional PCB circuit board, safe without noise and spark, anticorrosion, moistureproof and antivibration. Equipped with portable remote Controls for easy and remote operations. The signal can passthrough wall, floor, door, and stably Controls the receiver anywhere within distance. The ranges is up to 50m (without obstacles). Light size for portability and adaptability, easy to use. Specifications: Materials: ABS+metal Package Includes: 1Set Wireless Remote Controls Switches note: Please allow 1-3mm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item. Thank you!