Luckarm Wireless Doorbell is perfect doorbell to be you choice. Luckarm Wireless Doorbell equipped with flashlight design incorporated to bring convenience to the hearing handicapped, remote control and using alkaline battery. Luckarm Wireless Doorbell also designed to saving energy and easy to install. Luckarm Wireless Doorbell��s voltage is 200-240V, with 2W power and 150M operating range. Equipped with flashlight design, remote control, also use alkaline battery, voltage is 200-240V, 2W powers and easy to install. Size:16 CM