1\u3001PROMPT METHOD: Prompting methods are light flash vibration, light flash buzzer, light flash, vibration buzzer, low power consumption display can be flexibly combined. 2\u3001HUMANIZED DESIGN: Restaurant paging system supports 4 channels, each channel supports 5 buttons. One button with multiple watch receivers. 3\u3001WATCH DESIGN: Wireless watch pager has a stylish watch design is easy to use. Removable rechargeable battery with long stby time charging circuit protection. 4\u3001ANTI INTERFERENCE: Wrist pager supports IPX7 waterproof. Strong anti interference, fast speed accurate transmission. Operation range of 100\u2011200m in open distance. 5\u3001APPLICABLE: Wrist pager is widely used in various places such as home, factory, workshop, general assembly, bowling alley, massage room, church, elderly call alarm office. Item Type: Wireless Wrist Pager Model SU 691 Watch Receiver Parameters Description: Operating Frequency: 433.92MHz Material: ABS Charging Voltage: DC5V Operating Voltage: DC3.7V Rechargeable Lithium Battery Operating Current: 75\u00B110mA (Vibration, Buzzer Mode) 75\u00B110mA (Vibration Mode) Stby Current:10\u00B15mA Receiving Sensitivity: -107\u00B12dBm Decoding: Studycode Waterproof Rating: IPX7 Operating Temperature: -20\u2103-60\u2103 Battery Type: Lithium Battery Battery Capacity: 300mAh (Included) Model SU D1 Button Transmitter Parameters Description: Operating Frequency: 433.92MHz Battery Type: Alkaline Battery Battery Type: 12V23A Battery Capacity: 60mAh (Included) Transmitting Current: 10mA\u00B13mA Stby Current: <1uA Open Range: Approx. 100-200m \/ 328.1-656.2ft Push Button: 1 Million Times Waterproof Rating: IPX7 Working Temperature: -20\u2103-60\u2103 Single Key: CALL Applicable: Widely used in homes, factories, workshops, clubs, bowling alleys, massage rooms, churches, casinos, golf country clubs, hospitals, health clubs, elderly call alarms offices, etc. 1 x Watch Receiver 2 x Watch Button 1 x Power Cord 1 x Instruction Manual