installed the BTD-400 on several USB ports on two other PC and laptop computers.

set up the BTD-400 with the Broadcom software that came on the CD with the adapter, latest downloaded WIDCOMM software from Broadcom website, and without the software (and just the drivers that windows update automatically installed the adapter as 'Broadcom BCM20702 Bluetooth 4.0 USB device). installed the Kinivo BTD-400 on different USB 2.0 and 3.0 ports on my Windows 8.1 desktop PC I spent hours, days trying lots of things/combinations to confirm the problem, before even invoking the Kinivo Customer Care and considering a replacement/return from/to Amazon: During scan, the Kinivo saw select devices: it saw my Note 2 with v4.0 LE, laptop with v2.1, but not a Logitech Bluetooth audio adapter/receiver with v3.0, etc. Firstly, it's a power Class 2 (not Class 1) device with a max. However, when the Kinivo BTD-400 I bought arrived, the story was quite different. More importantly, the Kinivos are Microsoft-certified to work with Windows 8.

After a month of research and convincing, I stumbled upon more than 'rave' reviews of the Kinivo BTD-300 and BTD-400 adpaters on Amazon and elsewhere. So, began my search for a latest Win 8/8.1 supported v4.0 Bluetooth LE adapter. Researching the net thoroughly, I learned the ASUS BT211 is 'incompatible' with Windows 8/8.1. Over time, I noticed audio hiccups (not due to range or sync-related concerns) and primarily hang-ups of all media played over bluetooth. My 'major' application of the device is to wirelessly stream all of the PC audio (movies/songs, etc.) over the bluetooth link to my bluetooth-enabled speakers. So, basically, it works uninterrupted in a decently sized bedroom and living room. speed of 3Mbps, it is a power Class 1 device with an amazing range of 100 meters (330 feet) line-of-sight in open space. Despite the fact it's Bluetooth v2.1+EDR (it actually registers as a Qualcomm Atheros AR3011 HS v3.0 chip) with max. When I first setup my custom Windows 8 desktop PC in 2013, I bought an equally expensive ASUS USB BT211 bluetooth adapter for the PC.

Amazon kinivo bluetooth driver