KeyTronic Lifetime Trackball TRACKBALL-U1

I bought this because I was having shoulder/elbow pains from holding my arm out to move a mouse. I'd hoped that this keyboard would eliminate the need for that, and I think it would have worked had the execution been better.

me encanto el tener los precios de lo que necesito,pagina completamente recomendable para todos los que nos gusta averiguar y comparar antes de gastar los pocos pesos que manejamos.