Some customers"s feedbacks that the wireless range of the 2nd gen. BT adapter is not robust for some cell phones although about 60 ft for tablets. After months of study, the 3rd gen. BT adapter with much bigger antenna finally resolves the wireless range issue for cell phones. Package usually reach your residency within 3~4 days after your order. * If your Bose speaker was made before 2009 which cannot charge iphone 3, 4 or 4S, an extra power adapter is needed. Please go to this site "http://www.amazon.com/gp/product/B00DA06Z3I" for the solution) * Color: Black. 3nd generation sold after 8/21/213. Verifed at wireless distance 60 ft between Nexus 7 and Bose Sounddock before shipping. Double the working distance of most other similar devices. Have improved wireless range while working with cell phones when compared with the 2nd generation. * If your speaker can charge iPhone 3/4 or iPod touch through the 30 pin dock, this is the correct device for your speakers like Bose, Sony, JBL.... . Compatible with Bose Sounddock Portable, 10, I (can charge iphone 3/4) and II, Wave, JBL and SONY speakers which can charge iphone 3 or 4 or ipod touch. (If your Bose speaker cannot charge iphone 3, 4 or 4S, your Bose speaker was made before 2009. An extra power adapter is needed. Please go to this site "http://www.amazon.com/gp/product/B00DA06Z3I" for the solution) * This 3rd Generation Model with better and longer working distance (up to 60 ft, sold after 8/21/2013) (some customer even claims up to 80~90 ft) to play your favorite songs in your speaker with Bluetooth connection. Support iPad, iPod touch, iPhone, Samsung, HTC, tablets and all other devices with bluetooth function. This 3rd generation model comes with a much bigger antenna to detect the weaker bluetooth signal from cell phone so the bluetooth wirless range is much improved for cell phone whose bluetooth signals are usually weaker (to save battery power) when compared with tablets.