Calling High Sensitivity 20pcs Buttons with 1 Receiver IPX4 Waterproof Wireless Pager System for Bar Restaurant 1WIRELESS TECHNOLOGY: Restaurant calling pager button adopts wireless technology, stable and reliable, applicable to a variety of places, to meet the needs of large scale use, paging effect is remarkable. 2IMPROVE WORK EFFICIENCY: Wireless pager system can display the time of year, month and day, accurate and convenient, easy to record the call time, improve work efficiency. 3IPX4 WATERPROOF: Wireless restaurant pager system adopts IPX4 waterproof rating, high sensitivity receiver, reliable and durable. 4MULTI SCENARIO APPLICATION: Caregiver pager call button is suitable for home, hotel, bar, restaurant, factory and other places. 5EASY TO CARRY: Wireless call buttons are easy to carry and move around, made of ABS material, durable and can be used for a long time.Item Type:WirelessCallingSystemMaterial: ABSModel SU 620 Display Receiver ParameterOperating Frequency: 433.92MHzSize: Approx. 210 x 140 x 30mm / 8.27 x 5.51 x 1.18inMaterial: ABSReceiving Sensitivity: -105dBDecoding: Learning CodeWaterproof Rating: IPX4Operating Temperature: -20 to 60Pushbutton Transmitter ParameterOperating frequency: 433.92MHzMaterial: ABSBattery Type: Lithium BatteryBattery Model: CR2032x2pcsSingle Transmitter Battery Capacity: 240mAh (Included)Transmit Current: 10mA3mAStandby Current: Approx. 200meter / 656ftKeystroke:1 Million TimesWaterproof Rating: IPX4Operating Temperature: -20 to 60Dual key: (CALL)(CANCEL)20 xWirelessCallButtons20 xAdhesiveStickers1x PowerAdapter1 xReceiver1 x Instruction Manual