TECKNET WA878 Wireless Doorbell: The WA878 Plug-in Wireless Door Chime and Push Button makes it easy to connect visitors with a range of up to 400m/1,300ft. This doorbell boasts a remote connection that does not interfere with other equipment in your home, ensuring you never miss a visitor. It is perfect for homes, apartments, villas, offices, classrooms, hotels, factories, and hospitals. The doorbell features IP65 waterproofing, making it durable and capable of withstanding harsh weather conditions from -4 °F to 140 °F, including scorching heat, heavy rain, or snowstorms. With its ultra-low power consumption CR2032 lithium battery, the doorbell has a lifespan of up to 4.5 years. It offers 60 different chimes and 5 adjustable volume levels, ranging from 0dB to 120dB, to suit your needs. The RGB lights flashing can also assist individuals with hearing impairments. The smart memory function automatically recalls your previously set melody and volume level upon powering on, eliminating the need for resets even after a power outage. This doorbell provides 3 flexible working modes: Silent Mode (LED Flashing) for quiet environments, Sound Only Mode, and Sound and Flash Mode for daily use or social gatherings. Installation is effortless: the plug-in receiver easily connects to an electrical outlet (no batteries required). The push button can be fixed with screws or double-sided adhesive tapes. Package includes: 1 x TECKNET wireless doorbell plug in receiver, 1 x doorbell transmitter, 1x CR2032 battery, double-sided adhesive tapes, screws, and 1x user manual. Supports 36 months of support upon registration. Weight: 109.0 grams.