Feature 1PROMPT METHOD: Prompting methods are light flash and vibration, light flash and buzzer, light flash, vibration and buzzer, low power consumption display can be flexibly combined. 2HUMANIZED DESIGN: Restaurant paging system supports 4 channels, each channel supports 5 buttons. One button with multiple watch receivers. 3WATCH DESIGN: Wireless watch pager has a stylish watch design and is easy to use. Removable rechargeable battery with long standby time and charging circuit protection. 4ANTI INTERFERENCE: Wrist pager supports IPX7 waterproof. Strong anti interference, fast speed and accurate transmission. Operation range of 100200m in open distance. 5APPLICABLE: Wrist pager is widely used in various places such as home, factory, workshop, general assembly, bowling alley, massage room, church, elderly call alarm and office.SpecificationItem Type: Wireless Wrist PagerModel SU 691 Watch Receiver Parameters Operating Frequency: 433.92MHzMaterial: ABSCharging Voltage: DC5VOperating Voltage: DC3.7V Rechargeable Lithium Battery,Operating Current: 10020mA (Vibration, Buzzer Mode)7510mA (Vibration Mode)Standby Current:105mA.Receiving Sensitivity: -1072dBmDecoding: StudycodeWaterproof Rating: IPX7Operating Temperature: -20-60Battery Type: Lithium BatteryBattery Capacity: 300mAh (Included)Model SU D1 Button Transmitter Parameters Operating Frequency: 433.92MHzBattery Type: Alkaline BatteryBattery Type: 12V23ABattery Capacity: 60mAh (Included)Transmitting Current: 10mA3mAStandby Current: Open Range: 100-200m/328.1-656.2ftPush Button: 1 Million Times Waterproof Rating: IPX7,Working Temperature: -20-60,Single Key: CALL.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 xWatch Receiver,3xWatch Button,1xPower Cord,1xInstruction Manual