Feature:1. STABLE AND LONG DISTANCE: Wireless calling system adopts high performance wireless technology, strong anti interference, stable and reliable, applicable to a variety of places, paging effect is obvious.2. MULTIPLE APPLICATIONS: This wireless calling system is widely used in a variety of scenarios, suitable for home, hotels, bars, restaurants, factories, coffee shops, nursing homes and other various places.3. STYLISH AND PORTABLE: The receiver display adopts fashionable and modern design, which complements the beauty of the environment. Compact call key, easy to move, call anytime, anywhere.4. EASY TO USE: Wireless pager system is easy to use, the display shows the time, year, month and day, accurate and convenient, easy to record the call time, improve work efficiency.5. WATERPROOF: Both display receiver and call keys have IPX4 waterproof rating, high sensitivity receiver, reliable to use. With 30 call keys, it can be easily mounted on the table or wall with stickers, or put it in your pocket.Specification:Item Type: Wireless Calling SystemMaterial: ABSSU 620 Display Receiver Specifications:Working Frequency: 433.92MHzSize: Approx. 210 x 140 x 30mm or 8.3 x 5.5 x 1.2inReceiving Sensitivity: 105dBDecoding: Learning CodeWaterproof Grade: IPX4Working Temperature: -20 to 60Transmitter Specifications:Working Frequency: 433.92MHzBattery Type: Lithium BatteryBattery Model: 2 x CR2032Single Transmitter Battery Capacity: 240mAh (Included)Transmitting Current: 10mA3mAStandby Current: Less Than 1uAOpen Distance: More Than 200m or 656ftKey Life: 1 Million TimesWaterproof Grade: IPX4Working Temperature: -20 to 60Single Key: CALL.Package List:30 x Transmitters30 x Stickers1 x User Manual1 x Display Receiver1 x Supply Cable AdapterNote:Manual measurement, please allow some errors.