Vibe&reg; Portable Bluetooth 2.1 Audio Music Streaming Receiver Adapter with 3.5 Mm Stereo Output Audio-in for Streaming to Speaker Systems Such as Portable Speakers, Headphones, Home Stereo, Car Music Sound Systems Dimensions: 1.8 x 1.3 x 0.3 inches ; Guaranteed Quality - Lifetime Manufacturer's Limited Warranty Package Contents; 1x Bluetooth Receiver, 1x USB Charging Cable, 1x User Manual Plugs directly into your speaker or stereo's AUX line-in port via 3.5mm headphone plug! Charges via included USB cable in 2 -3 hours to deliver 12 hours of audio transmission! Turn your new and old speakers or your Car's audio system into Bluetooth enabled devices! Wirelessly receive music from your A2DP Bluetooth enabled smartphone, tablet or computer from up to 30 feet away! Utilizes Bluetooth 2.1 with A2DP streaming for powerful, enhanced audio quality, and features a one-touch control to pair with your device in seconds!