Item Type: LED Name Badge Optional Color: Blue, Yellow, White Point Spacing: 1.93mm Dot matrix: 11x44 Material: ABS plastic Dimensions: Approx. 93 x 30 x 6mm / 3.7 x 1.2 x 0.2in Screen size: Approx. 85 x 23mm / 3.3 x 0.9in Display Language: All national languages Storage Content: Can store 550 Chinese characters or 750 English characters or image information of the same capacity Switch Button: 1. Press the brightness button to adjust the brightness. Press and hold the brightness button to turn the machine on and off. 2. Short press the information button to switch the information. Display Speed: 8 levels, 1 is the slowest, 8 is the fastest Display Mode: Move up, down, left and right, fixed, flashing, snow, marquee, scroll, animation, laser Charging Time: 2 hours Voltage: 5V Battery Capacity: 240mah, 3.7V. Turn on the remaining battery. Working Time: 24 hours (when the brightness is 25%); at least 12 hours (when the brightness is 100%)