Welcome to the store! 1、CALLING METHOD: Prompt methods include light flash and vibration, light flash and buzzer, light flash, vibration and buzzer, low power display can be flexibly combined. 2、HUMANIZED DESIGN: Restaurant paging system supports 4 channels, each channel supports 5 buttons. One button can be linked to multiple watches. 3、WRIST WATCH: The wireless wrist watch has a stylish watch design and is easy to use. Removable rechargeable battery with long standby time and charging circuit protection. 4、ANTI INTERFERENCE: Wrist pager supports IPX7 waterproof. Strong anti-interference, fast speed and accurate transmission. Range of 100-200m in open space. 5、APPLICABLE: Wrist pager is widely used in various places such as homes, factories, workshops, general assemblies, bowling alleys, massage rooms, churches, alarms for the elderly, and offices. Item Type: Wireless Wrist Pager Model SU 691 Watch Receiver Parameters Operating Frequency: 433.92MHz Material: ABS Charging Voltage: DC5V Operating Voltage: DC3.7V rechargeable lithium battery Operating Current: 75±10mA (vibration, buzzer mode) 75±10mA (vibration mode) Standby Current: 10±5mA Receiving Sensitivity: -107±2dBm Decoding: Learning Code Waterproof Rating: IPX7 Operating Temperature: -20℃-60℃ Battery Type: Lithium Battery Battery Capacity: 300mAh (included) Model SU D1 Button Transmitter Parameters Operating Frequency: 433.92MHz Battery Type: Alkaline Battery Battery Type: 12V23A Battery Capacity: 60mAh (included) Transmitting Current: 10mA±3mA Standby Current: <1uA Open Range: Approx. 100-200 m / 328.1-656.2 ft Push Button: 1 million times Waterproof Rating: IPX7 Working Temperature: -20℃-60℃ Single Key: RING Applicable: Widely used in homes, factories, workshops, clubs, bowling alleys, massage rooms, churches, casinos, golf and country clubs, hospitals, health clubs, elderly call alarms, and offices, etc. Package List: 1 x Watch 2 x Watch Button 1 x Power Adapter 1 x User Manual Your 100% satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will give you the best solution!