... range is 70% of read range)Communication InterfaceWireless Bluetooth; Mini USBBluetooth Transmission Distance10-15mWorking voltageDC3.7-4.2V (built ... CAttachmentCharger,Data lines,SDKWe also can make bluetooth card reader to support 134.2K,125khz,13.56mhz cards. ... Anti-fake: customs, travel place, fieldLogistics management This reader comes with complete English SDK,demo software,source code ...