<p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Note:</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Win8.1/10/11 driver-free, plug and play, Win 7 need to install drivers.</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">This product is not supported on Mac OS/IOS system.</span></p><p><br/></p><p><br/></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">5.4 Bluetooth, dual-mode and dual-channel,</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Compatible with Bluetooth 2.0, 3.0, 4.0, 5.0, 5.1 and 5.3 specifications.</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Intelligent low-power chip, RF transceiver, providing lower delay, flexible and powerful Bluetooth application.</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Support Cass2 Power level 20 meters distance (in open environment)</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Support Bluetooth 5.4 dual-mode specification (LMP 13.X true Bluetooth 5.4 standard)</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Support USB2.0/3.0 interface.</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Support multiple devices to connect at the same time (up to 7 devices can be connected)</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Working temperature -20 to 70℃</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Operating system support: Windows 8.1, 10, 11 (driver-free, plug and play) windows7 installation drivers can be used.</span></p><p><span style="font-size:18px;font-family:arial, helvetica, sans-serif">Support protocols: HFP/HSP (hands-free phone/headset) A2DP/ AVRCP (stereo music) HID/HOGP (keyboard and mouse) /ACC. Android smart phone, etc.</span><strong><span style="font-size:20px;font-family:arial, helvetica, sans-serif">Bluetooth 5.4 USB Adapter,Faster Speed, Farther Coverage,Lower Power Consumption</span></strong><strong><span style="font-size:20px;font-family:arial, helvetica, sans-serif">Multi-device Connection,Support connection Bluetooth 5.0/4.0/3.0/2.0</span></strong><strong><span style="font-size:20px;font-family:arial, helvetica, sans-serif">Plug and Play For Windows 11/10/8.1,Driver required for Windows 7</span></strong></p><p><br/></p>