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Want to upgrade the working experience? The laser keyboard is dream of very tech person who want to show- off their typing experience Keyboard Layout: incline, full-sized QWERTY layout Projection Size: 250mm*100mm Operation Surface: Non-reflective, opaque flat surface Software compatibility: All HID compliant OS Detection Rate: Over 350 characters per minute Dimension(mm): 78mm\xc3\x9740mm\xc3\x9719mm Weight(g): 60g Charging power: USB ports/5V 1A Battery Capacity: Li-ion Battery,700mAH(MAX)@3.7V Battery Working Time: 120 mins Battery Charging Time: 120 mins Bluetooth: V3.0,HID Profile VER 1.0 Photoelectric Resolution: 3000dpi Frequency rating: 2402-2480MHz Channel: 79 Modulation: GFSK