No needs for additional batteries,Build-in 600mAh rechargeable battery.10-15 days to enjoy without interruption with built-in-battery while is full charged. You can charge the mouse with your PC or Power Bank conveniently(approximately 2-4 hour).
USB Nano-receiver Plug and play,No need driver. Nano-receiver stays in your PC USB port or stows conveniently inside the wireless mouse when not in use.
Smooth, precise wireless optical 4-button mouse. Ultra slim and lightweight design,Perfect for putting in your laptop bag or pockets and taking it for travel.