... battery ensures long working hour;Multiple connectivity options for receiver: Rs232, PS/2 or USB.Battery is detachable ... or rechargeSpecification: Optical PerformanceLight Source:650nm Laser Scan Rate:78scans/sec. Resolution (pcs0.9)0.10-0 ... distanceMax. 300mInterfaces Supported:RS232, PS/2 or USB.Receiver voltageDC 5VBattery Type:1800mA Lithium ion batteryWorking Current85mAMaterialABSDimensions:80 ...