G13 Black GSM Quad-band Watch Phone ~ UNLOCKED ~ Primary Function: Mobile Phone Watch with Touch Screen of 1.49 Inches GSM Compatibility: Quad-band 850MHz, 900MHz, 1800MHz, 1900MHz Battery Life - Talk Time: Up to 2.5 hours - Stand By: Up to 150 hours Also Function as Video Camera and Media Players Dimensions: - Watch: L:50 x W:40 x H:13.8 (mm) - Strap: Adjustable