5buttons wireless laser mouse +chargeable Receiver specification sheet Part 1:General features wireless freedom 27MHz digital radio frequency technology I channel 256 ID to avoid interference from other wireless devices 1.2 meter operating range 2 level power saving mode Receiver with battery charging function Laser sensor for precise and smooth tracking , no mechanical parts clean plug & play ,no driver repuired Part 2: Appearance specification Mouse size:128*66*40mm Receiver size:100*100*80mm Part 3: Electrical specification interface USB1.1 sensor report rate 6600 frames per second sensor tracking spced 28 inches /second Acceleration:20g laser beam on mouse :within class I AEL limit Resolution :400/800/1600dpi Operating angle:360 degrees Operating distance:1.2m frequency:27.045MHz No of ID :256 random Receiver power requirement :5V DC from USB Power consumption :battery type:2*AAA600mAb ni-MH batteries for mouse at operating mode <30mA Idle mode < 10mA sleep mode:<400uA after idling for 8 minutes Battery recharging time required:12 hours Battery charging cut off when batteries are fully charged colour of led during battery charging :red colour of led when batteries are fully charged :Green Part 4:system requirement Windows 98, Windows98SE ,Windows200,Windows xp or Windows ME