Feature 1WIRELESS DESIGN: Smart call system adopts wireless RF technology, the system is stable and the wireless receiving distance is long. 2ADJUSTABLE VOLUME: Wireless caregiver pager adopts adjustable volume design, supporting 4 levels of CNC volume adjustment, suitable for a variety of situations. 3REMINDER MODES: SOS call button has 31 kinds of ringtones to choose from, and has LED flashing light to remind, no string ringing and no false ringing. 4STABLE PERFORMANCE: Call button system adopts advanced microprocessor chip, stable and reliable performance. With 1 receiver 1 call button, support multiple pager settings. 5APPLICABLE PLACES: Wireless call button is widely used in various places such as home, villa, nursing the elderly, patients, pregnant women, hospitals, health clubs, and offices. 6EASY TO USE: Alert button is easy to use, plug and play, just press the button to get help, suitable for elderly, seniors, patients and disabled people.SpecificationItem Type: Smart Call SystemMaterial: ABSReceiver Parameters: Operating Frequency: 433.92MHzReceiving Sensitivity: 1072dBmDecoding: Learning CodeWaterproof Rating: IPX4Operating Temperature: 20 to 60Voltage: AC100240VTransmitter Parameters: Operating Frequency: 433.92MHzBattery Type: Alkaline BatteryBattery Type: 12V23ABattery Capacity: 60mAh (included)Emission Current: 103mAStandby Current: 200mPush Button: 1 Million TimesWaterproof Rating: IPX7Operating Temperature: 20 to 55Single Key: Call (CALL) Package List1 x Transmitter1 x Receiver1 x Instruction Manual