1、Watch Shape: Fashion watch design, dot matrix LCD display, using RF wireless technology, signal transmission stability. 2、Contains: 20 transmitters, a receiver, support watch call by information modification, a watch with up to 500 pagers. 3、Support: Support single or list display mode, support accurate time display, support vibration, buzzer prompt. 4、Rechargeable Battery: With removable rechargeable battery, long standby time and charging circuit protection. 5、Wide Application: Suitable for various places such as home, hotel, bar, restaurant, factory, workshop, teahouse, general club, bowling alley, massage room and country club, hospital, club, and office. Item Type: Watch Pager Product Material: ABS Watch Receiver Parameters: Operating Frequency 433.92MHz Operating Voltage: DC3.7V Battery Type: Lithium Battery Battery Capacity:400mah (Included) Operating Current: 57mA±10mA (Buzzer Mode) 95mA±10mA (Vibration Mode) Standby Current:<8mA Power Failure Current:180±5uA Receiving Sensitivity:-108dBm Decoding: Learning Code Waterproof Rating: IPX4 Operating Temperature:-20℃~ 55℃ Black Button Transmitter Parameters: Operating Frequency 433.92MHz Battery: DC12V Battery Type: Alkaline Battery (23A12V Battery) Single Receiver Battery Capacity: 60mah (Included) Transmitting Current: 10mA±3mA Standby Current: <1uA Open Range: >200m Push Button:1,000,000 Times Waterproof Rating: IPX4 Working Temperature: -20℃~55℃ Three Keys: Call, Bill, Cancel 1 x Watch Receiver 20 x Button Transmitter 1 x User Manual 1 x Charging Cable 20 x Film