INFINITER LR20 Wireless Presenter with Green Laser Pointer and Rechargeable Battery (LR20) Fantastic comfort grip; Built-in lithium battery, rechargeable via a USB port, thus ensuring it is environmentally friendly. Output power: Class IIIa, output power is less than 5mW, eye safe laser product. With dual color LED indicators, LED will change from red to green when charging is completed. If the battery power is running out, the Red LED will be flashing as a warning to save power. It can also cut off the power automatically if the user forgets to turn off the unit. The presentation can be made on an LCD display or a projection wall TV. Can easily remote control the mouse for a distance up to more than 15 meters in open space. Apply the 2.4G RF direction-free remote control technology and this unit can be operated without aiming at the receiver.