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• wireless RF (Radio Frequency) 2.4Ghz
• operation distance : 10 meters (32.8feet)
• interface : USB
• Key : 56 Keys
• compatibility : Windows 7 , 2000 ,2003 , XP , vista
• Total  travel 3.0 +/- 0.1mm
• initial actuating force :250mm min
• operating force :55+/-7cn
• Function : normally open contact
• insulation resistance : 100M OHM at DC 100V
• Contact Bounce : 5ms max.
• operation voltage : DC +3V+/-10%
• operating current : normal 10mA max. at DC +3V ; 80mA max. at DC+3Vwith EL.
• key life time with electrical load : 10 million min
• Battery : 2 Pcs "AAA" type 1.5 Volt (not include)
• Power Saving Mode : in order to increase the utility time of battery , we use the intelligent power saving technology on the RF product . they can automatically change the working mode into power saving mode when you are not using them .
• Size : 170x14x81mm