Feature:1. WIRELESS DESIGN: Smart call system adopts wireless RF technology, the system is stable and the wireless receiving distance is long.2. ADJUSTABLE VOLUME: Wireless caregiver pager adopts adjustable volume design, supporting 4 levels of CNC volume adjustment, suitable for a variety of situations.3. REMINDER 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.4. STABLE PERFORMANCE: Call button system adopts advanced microprocessor chip, stable and reliable performance. With 1 receiver 1 call button, support multiple pager settings.5. APPLICABLE 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.6. EASY 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.Specification:Item Type: Smart Call SystemMaterial: ABSReceiver Parameters: Operating Frequency: 433.92MHzReceiving Sensitivity: ‑107±2dBmDecoding: Learning CodeWaterproof Rating: IPX4Operating Temperature: ‑20℃ to 60℃Transmitter Parameters: Operating Frequency: 433.92MHzBattery Type: Alkaline BatteryBattery Type: 12V23ABattery Capacity: 60mAh (included)Emission Current: 10±3mAStandby Current: <1uAOpen Range: >200mPush Button: 1 Million TimesWaterproof Rating: IPX7Operating Temperature: ‑20℃ to 55℃Single Key: Call (CALL).Package List:1 x Transmitter1 x Receiver1 x Instruction Manual