1、WIRELESS 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. 2、IMPROVE 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. 3、IPX4 WATERPROOF: Wireless restaurant pager system adopts IPX4 waterproof rating, high sensitivity receiver, reliable and durable. 4、MULTI SCENARIO APPLICATION: Caregiver pager call button is suitable for home, hotel, bar, restaurant, factory and other places. 5、EASY 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: Wireless Calling System Material: ABS Model SU 620 Display Receiver Parameter Description: Operating Frequency: 433.92MHz Size: Approx. 210 x 140 x 30mm / 8.27 x 5.51 x 1.18in Material: ABS Receiving Sensitivity: -105dB Decoding: Learning Code Waterproof Rating: IPX4 Operating Temperature: -20℃ to 60℃ Pushbutton Transmitter Parameter Description: Operating frequency: 433.92MHz Material: ABS Battery Type: Lithium Battery Battery Model: CR2032x2pcs Single Transmitter Battery Capacity: 240mAh (Included) Transmit Current: 10mA±3mA Standby Current: <1uA Empty Distance:>Approx. 200meter / 656ft Keystroke:1 Million Times Waterproof Rating: IPX4 Operating Temperature: -20℃ to 60℃ Dual key: (CALL)(CANCEL) 20 x Wireless Call Buttons 20 x Adhesive Stickers 1 x Power Adapter 1 x Receiver 1 x Instruction Manual