Feature:1. Waterproof Call System: The watch and touchscreen bell are IPX7 waterproof, ensuring long lasting use in various environments.2. Flexible Combination: With 4 channels supporting up to 5 buttons, users can freely customize and arrange the components for versatile applications.3. Easy Operation: Equipped with RF wireless technology, the wireless call system is user friendly and suitable for use in homes, factories, hospitals, ensuring elderly care and emergency calls.4. Long Lasting Battery: The rechargeable lithium batteries provide a long standby time with low power consumption, ensuring reliable performance of the pager system.5. Wide Compatibility: The system is suitable for a range of settings and situations, providing convenience and security for users in need of assistance.Specification:Item Type: Wireless Call SystemMaterial: ABS Receiver Parameters: Working Frequency: 433.92MHzCharging Voltage: DC5VBattery Type: Lithium BatteryBattery Capacity: 300mAh (included)Working Current: 10020mA (vibration and buzzer mode), 7510mA (vibration mode)Standby Current: 105mAReceiving Sensitivity: -1072dBmDecoding: Learning CodeWaterproof Grade: IPX7Working Temperature: -20 to 60Transmitter Parameters:Working Frequency: 433.92MHzSize: Approx. 60 x 60 x 13mm / 2.36 x 2.36 x 0.51inBattery Type: CR2032x2Battery Capacity: 240mAh (included)Transmitting Current: 10mA3mAStandby Current: <1uAOpen Distance: >Approx. 100m / 328.08ftButton: 1 million timesWaterproof Grade: IPX4Working Temperature: -20 to 55Single Key: CALL.Package List:1 x Receiver1 x Transmitter1 x Charging Cable1 x User Manual