Stream music wirelessly from your smartphone/tablet to any stereo/stand-alone speaker via Bluetooth. Connect with your Bluetooth or NFC-enabled device, using the HA100 or NFC Tag. Connects to any stereo supporting 3.5mm or RCA jacks. Transmits up to 20 meters (66 feet) away, within direct line of sight. Bluetooth 4.1, compatible with all A2DP stereo Bluetooth devices. 2.6 x 2.4 x 0.7 in. Black.