This wireless doorbell doubles as a dog doorbell and a caregiver alert pager. With a 300m long range and waterproof design, it can be used indoors and outdoors for all types of homes. Easy to use with customizable volume and ring tone options, it's suitable for dogs of all sizes and elderly or sick patients who need assistance. Uses a 12V/23A battery and includes a transmitter and receiver. Features 1. Wireless Doorbell: It's a dog doorbells suitable for all size dogs-small, medium or large! It's also can be used as a wireless doorbell for home or as caregiver page for an elderly or sick patient. 2. Long Range: Receiver and transmitter in the barrier-free environment, the maximum effective working distance can reach 300 meters, it's great for large house. 3. Waterproof: The waterproof grade is IP55, built-in waterproof rubber ring can work normally on rainy days, and can be used indoors and outdoors. 4. Easy-to-Use: Bell rings using just 80 lbs of pressure, making it easy to use for dogs of any size. 5. Customizable: Bell volume and ring tone can be customized to the style of your choice, with 5 different volumes and different tones to choose from. Specification Material: ABS Color: White, Black Size: Receiver: 8 x 8 x 5 cm, Transmitter: 6 x 6 x 2 cm Weight: 150 g, 275 g Battery: 12 V/23 A Battery Plug Type: US Plug Receiver Voltage: 110-260 V Pressure Required: 80 lbs Waterproof: IP55 volume: 5-level Working Temperature: - 30 ~ + 70 Package Include: 1 Transmitter 1 Receiver or 1 Transmitter 2 Receivers