<p>1.Multifuncional, training the dog how to ring , protect your door vandalism, can also help emergency bell signaling;</p> <p>2.300m distance transmission Stable and efficient signal range up to 300m outdoors;</p> <p>3.1 receiver and 2 transmitters, offer more ;</p> <p>4.The receiver unit has 55 ring tones for . 5 adjustable volume levels from 0db to 110db .;</p> <p>5.Easy to use (plug and play), it is perfect for large houses, such as villas, apartments, offices, warehouses, etc.</p> <p>Type: Wireless</p> <p>Doorbell Model: N668Q-2T1-W</p> <p>Charging Type: Pluggable Charging Plug</p> <p>Voltage: 110-220 (V)</p> <p>Power: 0.035-0.2 (W)</p> <p>Operating temperature: -30 C to + 70 C</p> <p>Transmitter water resistance degree: IP55</p> <p>Operating distance: 300 meters (open and without barrier)</p> <p>Number of : 55</p> <p>Volume: 0-110 Db</p> <p>Features: Eco-friendly, Low Power Consumption, 55 Ring Tones, IP55 Water Resistant, Door Sensor with Wireless Mobile Sensor</p> <p>Plug Type:US Plug,it applies to Canada, India, Japan, Mexico, Thailand, Taiwan,the , the Philippines and so on.</p> <p>size:</p> <p>Receiver :8*8*5cm</p> <p>Transmitter:6*6cm</p> <p>Material:plastic</p> <p>colour:black</p> <p>Package Contents:</p> <p>1 * Receiver </p> <p>2 * Transmitter</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>