Features 1、Versatility: Our remote control switch is widely applicable to various products, such as remote control switch, anti theft alarm, remote control door lock, remote control electric rolling shutter doors and window, industrial control products, etc. 2、High Sensitivity: In an open environment, the sensitivity of our remote control switch can reach ‑100dbm. In an environment with relatively large wireless interference, the transmission distance may be shortened. 3、Easy to Replace Battery: Open the back cover of the remote control button to replace the battery. Our portable doorbell easily pairs and connects so you can make your battery powered. 4、Durable ABS Housing: Our remote switch has durable ABS housing, which is wear proof, tear proof and not easy to deform. It is durable and has long service life. 5、Wide Application: Our remote control switch is great for large homes, apartments, offices, and warehouses. It can bring you a better and safer use experience. Specifications Item Type: Remote Control Switch Material: ABS Weight: Approx. 18g/0.63oz Outer Diameter: 45mm/1.77in Inside Diameter: 30mm/1.18in Operating Frequency: 433 MHz How To Work: Copy Working Voltage: DC3V Quiescent Current: 0.1uA Emission Current: 7.1mA Transmission Power: 3-6dBm Learning Code: 1527 2240 Remote Control Distance: 50-100 (under open environment, the sensitivity of the receiver is - 100dbm) Battery Type: Button battery (shipped with built in battery) Battery Model: CR2016 Battery Capacity: 200mAh Number of Batteries: 3 Package List 1 x Remote Control Switch 1 x Double Sides Adhesive Tape