1、STABLE AND LONG DISTANCE SIGNAL TRANSMISSION: Calling system is highly interference resistant and system signal range cover 1000ft in open area(wall and other objects will decrease operating distance, the actual distance depend on the actual distance; Digital coding technology, can be compatible with learning code and common code chip, stable system with long wireless receiving distance 2、FULLY FUNCTIONAL AND PRACTICAL: Wireless pager most support 1000pcs wireless call button, pager easy to configure button, delete button, adjust volume and delete all number, which is definitely a good helper for your business 3、EASY USE AND LONG STANDBY TIME: Wireless calling buttons can be easily installed on each table or wall with sticker, also can put in pocket or hanging on the neck, so that the customer or the patient can get help quickly and conveniently, call button standby time up to 6‑12 months 4、WIDELY USED IN VARIOUS OCCASION: Wireless paging service system is applied to restaurant, nursing home, cafes, supermarkets, hotel, hospital wards, emergency center, banks, schools, factories, construction sites, can help you improve quality of service 5、WATERPROOF BUTTON DESIGN: Wireless calling buttons and ABS shell is long lasting in use, buttons have been paired with receiver, plug and play Item Type: Wireless Calling System Display Receiver Parameters: Frequency: 433.92MHz Size: Approx. 210 x 140 x 30mm / 8.27 x 5.51 x 1.18in Material: ABS and PVC Sensitivity: -105dB Decoding: Learning code Waterproof Level: IPX4 Operating Temperature: -20℃ ~ 60℃ SU-1K Button Transmitter Parameters: Frequency: 433.92MHz Material: ABS and PVC Battery Type: 12V 23A Battery Capacity: 30 x Alkaline battery 60mAh Transmitting Current: 10mA±3mA Standby Current: <1uA Transmission Distance: >200m Button Life: 1 Million times Waterproof Level: IPX4 Operating Temperature: -20℃ ~ 60℃ Single Button: CALL 1 x Call Bell 1 x Power Cord 1 x User Manual 30 x Buttons 30 x Double Sided Tape