Bluetooth Transmitters features: CF723B bluetooth4.0 Wireless Adapter Receiving Transmitting 2 in 1 USB4.0 USB Adapter bluetooth transmitter comworking Adapter Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Specification:ModelCF-723BAntennaInternal high gain 2dBi antennaUSB PortUSB2.0Wireless FrequencyWiFi: 2.412~2.484GHz BT4.0: CHO~78Wireless StandardIEEE802.11b/g/nRF powerWiFi: 17dBm BT: 10dBmTransmission RateWiFi: 11b: 1/2/5.5/11 Mbps 11g: 6/9/12/18/24/36/48/54 Mbps 11n: 150Mbps BT: 1 Mbps for Basic Rate 2.3 Mbps for Enhanced Data RateEncryptionWPA-PSK/ WPA2-PSK WPA/ WPA2 WEPSupport OSWindows 7/8/8.1/10 (32bit/ 64bit); (WiFi) Mac OS 10.6~Mac OS 10.15; (WiFi) Remark: BT driver doesn't support Windows XP/ Vista/ MACOther functionAnalog AP functionWorking environmentWorking temperture: 0 â~40â?br /> Storage temperture: -40â~70â?br /> Working humidity: 10%~90% RH Non-condensing Storage humidity: 5%~90% RH Non-condensingFeatures:1. Not only bluetooth but also wireless adapter2. Wireless and enjoy freedom, having it is equivalent to having a bluetooth transmitter and wireless USB adapter.3. bluetooth 4.0, stable transmission.4. Connect to bluetooth wireless earphone.5. CF-723B adopt 11n adopt the 11n wireless technology, data in the LAN is more efficient and stable.6. Mini and convenient, portable WiFi.7. Wireless Intercom access on desktop.8. Multiple equipment share Intercom.9. Support multiple operation system. Package Included:1 X CF723B bluetooth4.0 Wireless Adapter