2.4G Wireless Connection: A tiny USB nano receiver connects both keyboard and mouse with a range of up to 10m, ensuring signal stability while saving more USB ports. Plug and play, no driver required. Built-in UPDATED high capacity lithium battery, once charged for up to 3-month use, easy to charge through micro USB cable (Approx. 2-hour full), no longer need to replace the battery. The scissor-switch structure with low profile keys delivers comfortable, smooth and noiseless laptop-like typing experience. provide all-day comfort for your work and entertainment. Specifications Connection method: 2.4G wireless Transmission distance: 35 ft Charging time: 2-3 hours Interface Type: USB 2.0 Keyboard battery capacity: 400mAh Keyboard weight: 285±5g Keyboard size: 284*121*16.5mm Mouse battery capacity: 400mAh Mouse DPI: 800/1200/1600 Mouse weight: 85±5g Model Compatibility PC, Laptop, Windows devices, Windows XP, Windows 7/8/10 Own this INPHIC wireless keybord mouse combo now. And you'd be surprised your spend on this combo is the best investment you've spent on your entire rig.