ITEM NAME:HX1838 Arduino Infrared IR Wireless Remote Control Sensor Module Kits JR Battery:CR2025 Button batteries Transmission Distance: up to 8m (depending on the surrounding environment, sensitivity of receiver etc) Effective Angle: 60Â ° Static Current: 3~5uA, Dynamic Current: 3~5mA Remote size: 8.5 x 4 x 0.65cm/3.3 x 1.6 x 0.25inch (L x W x H) Note :Battery is NOT included (you know battery is not safe shipped by airfreight , pls kindly understand us ) Package Included: 1 x HX1838 VS1838 Infrared IR Wireless Remote Control Sensor Module Kit.Battery:CR2025 Button batteries.