Have the desire to play your original nes snes game cartridges while on the go the retro duo portable handheld by retrobit allows you to play your 16 bit 8 bit and even the original genesis cartridges on the road with up to eight hours of play time from the equipped dual capacity lithium ion battery the rdp is the perfect choice for retro gamer road trips this portable handheld device is mobile and travel friendly so you can show off your old school gaming skills everywhere you go