【WIRELESS DOORBELL BATTERY OPERATED】 This JSIEEM flashing doorbell is powered by 3 AAA batteries (included), so no electrical outlet is needed. The receiver can be mounted on the wall with screws, or simply placed on a desk. You can also take it to the backyard, basement, garage, or bedroom. 【TOUCH BUTTON WIRELESS DOORBELL】 The touch button is our new wireless doorbell design. Featuring IP44 dustproof and waterproof capabilities, higher sensitivity, and lower energy consumption, the push button can be installed indoors or outdoors. 【FLASHING LIGHT DOORBELL】 This wireless doorbell features 36 melodies and 4 volume levels (silent-low-medium-high). The built-in large LED indicator provides additional assistance for the hearing impaired. 【LONG RANGE UP TO 1200 FEET】 The strong wireless signal of this battery-powered doorbell reaches up to 1200 feet in an open area and won't interfere with other equipment in your home or your neighbors'. 【EASY TO INSTALL DOORBELL】 Simply install 3 AAA batteries in the receivers and attach the transmitter (pull out the insulation sheet inside) to the door frame. Do not install too close to metal or machines such as TVs, WiFi equipment, computers, etc.