Feature:1. PROMPT 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.2. HUMANIZED DESIGN: Restaurant paging system supports 4 channels, each channel supports 5 buttons. One button with multiple watch receivers.3. WATCH 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.4. ANTI INTERFERENCE: Wrist pager supports IPX7 water resistant. Strong anti interference, fast speed and accurate transmission. Operating range of 100200m in open distance.5. APPLICABLE: 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.Specification:Item Type: Wireless Wrist PagerModel SU 691 Watch Receiver Parameters Description:Operating Frequency: 433.92MHzMaterial: ABSCharging Voltage: DC5VOperating Voltage: DC3.7V Rechargeable Li BatteryOperating Current: 7510mA (Vibration, Buzzer Mode)7510mA (Vibration Mode)Standby Current:105mAReceiving Sensitivity: -1072dBmDecoding: StudycodeWater Resistant Rating: IPX7Operating Temperature: -20-60Battery Type: Li BatteryBattery Capacity: 300mAh (Included)Model SU D1 Button Transmitter Parameters Description:Operating Frequency: 433.92MHzBattery Type: Alkaline BatteryBattery Type: 12V23ABattery Capacity: 300mAh (Included)Transmitting Current: 10mA3mAStandby Current: 10mAOpen Range: Approx. 100-200m / 328.1-656.2ftPush Button: 1 Million TimesWater Resistant Rating: IPX7Working Temperature: -20-60Single Key: CALLApplicable: 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 Receiver3 x Watch Button1 x Power Cord1 x Instruction Manual