Mp4 watch Dimension (l x w x h): 40mm x 39mm x 12mm Memory capacity: up to 2gb high speed flash memory Screen: 1.5 inch oled 65k color Color: black, milk white, blue and orange. Weight: approx. 51g Silica gel watchband Menu/vol+/-, pre/next. Play/pause function buttons for easy operation Frequency response: 20hz to 20khz Audio output distortion: