Specification: Frequency: 2.4GHz Max Output: Less than 5mW Control Distance: 100m Light Distance: Greater than 200 m<br><br>Wave Length: 650nm Light: class 3R Working Voltage: 3.6V-4.2V Sleep Current: Less than 5uA Battery: 240mAh lithium polymer Compatibility: Windows 2003, XP, Vista, Windows 7/8/10, Mac OS, Linux, Android color: Black material: plastic Please Note: The product is not toys and should not never under any circumstances be directed into people's eyes or at passing aircraft. It should be used by anyone under 21. It's illegal to direct the beam at any flying objects, moving vehicle and any public or private structures.<br><br>Package Contents: 1 x USB wireless pointer<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.