Feature:1. Battery Powered: With battery power, this doorbell eliminates the need for complex wiring installation, providing a quick and convenient setup.2. Long Signal Range: With reception distance of 300m, this doorbell provides a long operating range, ensuring that you never miss a visitor or delivery at your doorstep.3. Durable Design: The waterproof design makes it suitable for both indoor and outdoor use, with a solid construction that can withstand various weather conditions.4. Simple but Practical: Feature a simple design, including one receiver and one transmitter, allowing you to conveniently install and never miss any visitors.5. Easy Operation: This wireless doorbell requiring no special technical skills, effortlessly set and flexible install to meet your personalized preferences.Specification:Item Type: Wireless DoorbellMaterial: Hard plastic.Size: Approx. 13x8x7cm/5.12x3.15x2.76inReceiver Battery: AAA1.5V dry battery x3 (not included)Transmitter Battery: 50mAh 23A12V dry battery (built in)Package List:1 xReceiver1 x Transmitter1 x Sticker1 x Adhesive2 x Screw