2.4G RF frequency, which is an ISM free frequency can be used world-wide<br><br> Transmitter Features: <br> Frequency: For Bluetooth & 2.4GHz<br> Max Output: Less than 5mW<br> Light Class: 3R <br> Light Distance: >200m<br> Working Voltage: 1.5V<br> Sleep Current less than10uAv<br> Dimension: 4.5*4.5*2.5cm<br> Weight: 30g<br> Receiver Features: <br> Operation System: XP, Windows 7/8/10, Mac OS, Linux, Android<br> USB Version: USB 1.1, compatible with USB2.0, USB 3.0<br> Weight: 1.6g<br><br> Package listing: <br> 1 x Wireless Presenter Remote Control<br> 1 x Wireless Receiver<br> 1 x User Manual<br> 1 x Pouch Case<br><br>