BS-SK7 Wireless Exit_Button

BS-SK7 Wireless Exit Button Features:

Dimension: 3.15'L x 1.89'W x 0.6'H ( Inch )
Power : 1 unit of 2032 Lithium Battery
Communication Frequency : 433 MHz
Communication Distance: 100 Feet Max
Working Current :  < 30mA
Weight : 34G
Base On 20 times Per day , It can work about one year .

One year warranty