1Stylish Watch: This patient pager system features stylish watch receiver design, radio frequency technology provides stable signal transmission. 210 Buttons: This wireless calling system provides 10 pagers and 1 watch receiver. One watch supports up to 500 pagers. 3Dual Mode: This customers pager system supports accurate time display. Vibration or buzzer prompt mode. 4Detachable Battery: This patient calling system adopts detachable battery, offering long stand by time. Circuit protection for charging ensures high safety. 5Wide Application: This restaurant paging system is perfect for restaurant, nursing home, cafe, supermarket, hotel, hospital ward, emergency center, bank, school, factory, construction site. Item Type: Patient Pager System Material: ABS Watch Receiver Specification: Operating Frequency: 433.92MHz Operating Voltage: DC3.7V Battery Type: Lithium Battery Battery Capacity :400mAh (Battery Included) Operating Current :57mA10mA(Buzzer Mode), 95mA10mA(Vibration Mode) Standby Current: