Feature:1. RF Wireless Technology: RF wireless technology, stable system, long wireless receiving distance. The open distance is more than 200 meters.2. Waterproof: Call buttons use advanced micro processing chip, which makes its performance stable, reliable and waterproof.3. ABS Material: Wireless pager button is made of sturdy ABS material shell, wear resistant and durable, suitable for increasing the working frequency of 433.92MHz broadcast host display.4. Simple Operation: Only need to set up the machine first, press the button of the transmitter, the receiver can receive the reminder5. Wide Range of Applications: Widely used in homes, hotels, bars, restaurants, factories, workshops, restaurants, clubs, bowling alleys, massage rooms, churches, country clubs, health clubs, and offices and other places.Specification:Item Type: WirelessPager Call ButtonMaterial: ABSOperating Frequency: 433.92MHzBattery: 2 Built in CR2016 Button Batteries(Included)BatteryCapacity: 80mAhEmission Current: 10mA3mAStandby Current: <1uAOpen Distance: >200 MetersKeystrokes: 1 Million TimesWaterproof Grade: IPX4Working Temperature:Minus20 to 55Four Keys: Call, Checkout, Order, Cancel.Package List:10 x Call Buttons 10 x Film