Our shop are all 100% original authentic\nc127rdqscn\n[ Description ]\nOur shop are all original authentic.\n[ Release Date(yyyy/mm/dd) ] \n2015/10/17 [Connection method] wireless 2.4GHz band \n [number of buttons] 5 button * including wheel button \n [Size] L size, thumb-operated type trackball \n [power] AA alkaline batteries, AA manganese batteries, AA either one of low energy mode of the nickel-metal hydride batteries: about 273 days, high-speed mode: about 176 days * by the Company using standard \n [warranty] 6 months \n [sensor] optical sensor system\n\n* adopt a large artificial ruby ??of wireless 2.4GHz mouse diameter 2.5mm to support ball. Certainly basic performance and equipped with unprecedented new features, wireless track ball of the left hand, thumb-operated type to achieve a pointer follow-up evolved. * per the manufacturer directly for goods, payment will be correspondence only \""\""pre-payment\""\"". * \""\""Specify cash time\""\"" can not please understand. * After the g