Feature: Low Battery Indicator. When the battery is too low, the indicator light will be blue and flicker for a while.  USB Receiver, Plug and Play.  Remote Control. 100m remote control distance, over 200m red light range plus 360° control, enable you to give presentation at ease and be free of worry about distance.  Bright Red Light Pointer. A warm reminder for participants to catch each detail you speak.  Stable Transmission. Adopting 2.4Ghz RF transceiver, it offers low power consumption and good performance, used widely in any kind of public occasions. Wide Compatibility. Compatible with Window xp, Win 7/8/10, MAC/iOS, Android, and Office series page-turning format files. Specification: Remote control distance: 100m Red light range: >200m Power supply: 1 * AAA (Not included)  Rated voltage: 3.7V Transmitting technology: 2.4Ghz RF transceiver Item size: 143*19*16.3mm/ 5.63* 0.75* 0.64in  Item weight: 21g/ 0.74oz Package size: 170* 55* 25mm / 6.69* 2.17* 0.98in Package weight: 45g / 1.59oz Packing list: 1 * Presenter remote 1 * User manual