Enhance your communication efficiency with this advanced Wireless Call System featuring cutting-edge RF wireless technology. Designed for flexible and reliable operation, this system supports up to 998 selectable channels, allowing customizable learning code combinations for easy and interference-free setup. The receiver sports a convenient wrist watch design, offering comfortable wearability along with multiple notification modes including vibration and buzzer alerts. Built with durability and convenience in mind, the receiver includes a rechargeable lithium battery with long standby time and a secure charging circuit guard to ensure safe power management. Key Features: · RF Wireless Technology with 998 Channels: Enables flexible code combinations for seamless pairing and minimal interference in diverse environments. · Wrist Watch Receiver Design: Lightweight and comfortable to wear, supporting vibration and buzzer notification modes with low power consumption for extended use. · Versatile Application: Perfect for use in homes, schools, restaurants, and other settings requiring efficient call communication and alert systems. · Flexible Pairing Options: One transmitter can connect to multiple receivers while one receiver can be paired with multiple transmitters, providing adaptable usage scenarios. · Long Standby and Rechargeable Battery: Removable 300mAh lithium battery in the wrist receiver ensures extended standby time, supported by a built-in charging circuit guard for safe charging. · Durable and Water-Resistant: Both transmitter and receiver feature IPX4 water resistance, suitable for various environments with working temperatures from -20℃ to 60℃. · High Sensitivity and Wide Range: Receiver sensitivity of -107±2dBm and transmitter open distance exceeding 1000 meters for reliable communication even in complex settings. Specifications: Material: ABS Wristband Receiver Parameters: · Working Frequency: 433.92MHz · Working Current: 100±20mA (Vibration+Buzzer Mode), 75±10mA (Vibration Mode) · Battery Type: Lithium Cell (300mAh included) · Standby Current: 10±5mA · Reception Sensitivity: -107±2dBm · Decoding: Learning Code · Water Proof Level: IPX4 · Working Temperature: -20℃ to 60℃ Transmitter Parameters: · Working Frequency: 433.92MHz · Battery Type: 23A 12V battery (60mAh included) · Transmitting Current: 10mA±3mA · Standby Current: <1uA · Open Distance: >1000 meters · Key Durability: 1,000,000 presses · Water Proof Level: IPX4 · Working Temperature: -20℃ to 55℃ · Single Key Function: CALL Package Includes: · 1 x Wireless Call System (Transmitter and Wrist Watch Receiver) This wireless call system offers a reliable, easy-to-use solution for instant communication and alerts, combining flexible channel selection, durable construction, and versatile pairing. Its compact wrist watch receiver coupled with a powerful transmitter makes it ideal for dynamic environments where prompt response and clear communication are critical.