Backtrack Original G2 - Measures 3.54" x 2.95" x .75". Grayscale LCD screen. Store and locate up to three separate locations. Utilizes the latest digital technology. High sensitivity GPS receiver. Self-calibrating digital compass. Operates on 2-AAA batteries (not included). Compact size stores easily in pocket. LED backlight. Auto shutoff. Color: Black/Green. Hang packaged.