Feature:1. RF Wireless Technology: Wireless caregiver watch features a dot LCD display with RF wireless technology and a stylish watch design2. Removable Rechargeable Battery: Wireless calling system uses a removable rechargeable battery for long standby times, with rechargeable circuit protection3. Convenient: A watch can only be equipped with a maximum of 500 pagers, with 10 transmitters and one receiver. Supports the watch call to be modified according to information4. Supported Functions: Calling caregiver watch supports single or list display mode, accurate time display, vibration and buzzer prompt5. Scope of Application: Calling caregiver watch can be used at home, hotels, bars, restaurants, factories, clubs, hospitals and officesSpecification:Item Type: Wireless Caregiver WatchMaterial: ABSDescription of Receiver Parameters of SU R169 Watch:Operating Frequency is 433.92MHzOperating Voltage: DC3.7VType of Battery: Lithium BatteryBattery Capacity: 400mah(included)Operating Current: 57mA10mA (buzzer mode) and 95mA10mA (vibration mode)Standby Current: < 8mAPower Off Current: 1805uAReceiving Sensitivity: -108dBmDecoding: learning CodingWaterproof Grade: IPX4Operating Temperature: -20~ 55Parameter Description of Model SU C01 (black) Button Transmitter:Operating Frequency is 433.92MHzBattery: DC12VType of Battery: Alkaline Battery (23A12V battery)Single Receiver Battery Capacity: 60mAh (included)Emission Current: 10mA3mAStandby Current: < 1uAOpen Distance: > 200mPress Key: 1 Million TimesWaterproof Frade: IPX4Operating Temperature: -20~ 55Single Key: CALL.Package List:1 x Wireless Caregiver Watch Receiver10 x Wireless Caregiver Watch Button1 x User Manual 1 x Power Cable10 x StickerNote:Shipped with built in battery