1、Stable Signal Transmission: This wireless calling system is highly resistant to interference, the system signal range covers an open area of 1,000 feet (walls and other objects will reduce the operating distance, the actual distance depends on the actual distance). The digital coding technology can be compatible with both learning code and common code chips, the system is stable, the wireless receiving distance is far. 2、Multifunctional: This caregiver call button system is multifunctional, it supports up to 1,000 wireless call buttons, pager easy to configure buttons, delete buttons, adjust volume and delete all numbers, definitely a good helper for your business. 3、Easy To Use: The wireless call button of this call system can be easily mounted on every table or wall with a sticker, or can be carried in your pocket or hung around your neck. So that clients or patients can get help quickly and conveniently, the call button standby time is up to 6‑12 months. 4、Sturdy And Robust: This nurse alert call buttons and receiver is made of excellent ABS and PVC material, sturdy and abrasion resistant, not easy to be damaged, waterproof, and with a long service life. 5、Wide Application: This pager restaurant system has a wide range of applications and can be used in restaurants, nursing homes, cafes, supermarkets, hotels, hospital wards, emergency centers, banks, schools, factories, construction sites, which can help you improve the quality of service. Item Type: Wireless Call System SU-620 Display Receiver: Working Frequency: 433.92MHz Size: Approx. 210 x 140 x 30mm / 8.27 x 5.51 x 1.18in Material: ABS, PVC Receiving Sensitivity: -105dB Decoding: Learning Code Waterproof Level: IPX4 Operating Temperature: -20℃-60℃ SU-1K Transmitter Button: Working Frequency: 433.92MHz Material: ABS, PVC Battery Model: 12V 23A Battery Capacity: Alkaline Battery 60mAh x 10 (included) Transmission Current: 10mA±3mA Standby Current: <1uA Open Distance: >200m Key Press: 1 Million Times Waterproof Level: IPX4 Operating Temperature: -20℃-60℃ Single Button: Call 1 x Display Receiver 1 x Power Cord 1 x Manual 10 x Buttons 10 x Double Sided Tapes