Easily add Bluetooth to your car audio systems, home stereos, speakers, wired headphones via the auxiliary 3.5mm AUX socket - Minimal footprint slim design with 3.5 mm plug. Plug & play, easy setup, one button operation, clear status indicator. Latest version 5.0 of Bluetooth wireless communication standard, Low latency, Noise cancelling, improved speed & range, dual audio and backwards compatible. CVC8.0 Noise Cancellation and DSP technologies cancel echo and block out intrusive background noise and create lossless audio CD-class quality music. Hands-free Bluetooth call and navigator voice via built-in microphone; 4-hour continuous work via the built-in li-ion rechargeable 140mAh battery. Make easily your TV / projector Bluetooth-enabled by using the transmitter (Tx) mode via the 3.5mm audio jack.