Gupbes Wireless Call Buttons

Specification: Item Type: Wireless Pager Call Button Material: ABS Operating Frequency: 433.92MHz Battery: 2 Built in CR2016 Button Batteries Included Battery Capacity: 80mAh Emission Current: 10mA±3mA Standby Current: <1uA Open Distance: >200 Meters Keystrokes: Times Waterproof Grade: IPX4 Working ...Specification: Item Type: Wireless Pager Call Button Material: ABS Operating Frequency: 433.92MHz Battery: 2 Built in CR2016 Button Batteries Included Battery Capacity: 80mAh Emission Current: 10mA±3mA Standby Current: <1uA Open Distance: >200 Meters Keystrokes: Times Waterproof Grade: IPX4 Working Temperature:Minus20 degrees Celsius to 55 degrees Celsius Four Keys: Call, Checkout, Order, Cancel Package List: 10 x Call Buttons 10 x Film