Features<br><br>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. <br>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.<br>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.<br>4. Easy-to-Use: Bell rings using just 80 lbs of pressure, making it easy to use for dogs of any size.<br>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.<br><br>Specification<br>Material: ABS<br>Color: White, Black<br>Size: Receiver: 8 x 8 x 5 cm, Transmitter: 6 x 6 x 2 cm<br>Weight: 150 g, 275 g<br>Battery: 12 V/23 A Battery<br>Plug Type: US Plug<br>Receiver Voltage: 110-260 V<br>Pressure Required: 80 lbs<br>Waterproof: IP55<br>volume: 5-level<br>Working Temperature: - 30 ~ + 70 <br><br>Package Include:<br>1 Transmitter<br>1 Receiver<br>or<br>1 Transmitter<br>2 Receivers