These lighted readers are perfect for reading or performing near tasks in a dark or dimly lit environment (deciphering restaurant menus, reading in bed while your partner is asleep, etc.). Each unisex tortoise-framed pair features two LEDs - one on each temple. The LEDs will never need replacing. The LED lights are very focused on the object being viewed; you needn't worry about disturbing others with the light (just don't look straight at anyone!). You can turn the lights on/off (separately) with the flick of a switch on either side. The LED lights are powered by four button batteries (CR-1632) that last up to 50 hours. These readers come with TWO free sets of batteries (a total of 8 batteries!); also comes with a hard protective case.