Feature: 1. RF WIRELESS TECHNOLOGY: Wireless calling pager system adopts RF wireless technology, accurate transmission, strong anti interference, fast transmission, easy to penetrate the wall, long distance. 2. WATERPROOF: The waterproof rating of the watch receiver is IPX7, and the waterproof rating of the button transmitter is IPX4. It does not need to be removed during daily exercise, rainy day or even when washing hands, to ensure long term use, reliable and lasting. 3. WIDELY APPLIED: Wireless calling pager system is suitable for elderly care, emergency call function, safe and reliable. Also suitable for hotels, clubs, bathhouses, babysitters and so on. 4. 4 CHANNELS: Wireless calling system supports 4 channels, which can be freely combined and flexibly applied to meet different needs. One to one wireless caller system, 1 watch and 1 touch bell. 5. ULTRA LONG STANDBY: Wireless calling pager system has ultra long standby time, rechargeable battery, low power consumption design, lasting. Specification: Item Type: Wireless Calling Pager System Material: ABS Watch Receiver Parameters: Operating Frequency: 433.92MHz Charging Voltage: DC5V Battery Type: Lithium Battery Battery Capacity: 300mah(Included) Operating Current:100±20mA(Vibration, Buzzer Mode) 75±10mA(Vibration Mode) Standby Current:10±5mA Receiving Sensitivity:-107±2dBm Decoding: Learning Code Waterproof Rating: IPX7 Operating Temperature:-20℃~ 60℃ Pushbutton Transmitter Parameters: Operating Frequency: 433.92MHz Battery Type: CR2032x2 Press Lithium Battery Capacity: 240mAh (Included) Transmit Current: 10mA±3mA Standby Current: <1uA Open Distance: >Approx. 100m / 328.1ft Keystroke: 1,000,000 Times Waterproof Grade: IPX4 Operating Temperature:-20℃~ 55℃ Single Key: Call. Package List: 1 x Watch Receiver 1 x Calling Transmitter 1 x Charging Cable 1 x User Manual