1.Crystal casing Bluetooth USB Adapter2.Wireless frequency:2.402-2.480GHZ3.Transmiter speed :723Kbps4.Communication range:up to 10m5.LED:Power,Active6.Certification:FCC,CE,BQB;7.Support bluetooth Profile: Serial Port,Dial Up8.Networking, Fax, Headset, PIM Item9.Transfer, PIM Synchronization, File10.Transfer, Network Access,Audio11.Bluetooth Chipset: CSR,ISSC,BROADCOM available12.Interface :USB1.2,2.0,2.1 available