- 2in1 adapter: turns every device with 3.5 mm jack bush into a Bluetooth transmitter or receiver ,- Optional selection between transmitter and receiver mode ,- Transmitter: Music transmission from a TV set, PC/notebook, stereo system, etc. to a Bluetooth-compatible headphone, loudspeaker, etc. ,- When used as a transmitter, up to 4 receivers can be stored and the audio signal can be sent simultaneously to 2 BT devices ,- Receiver: music transmission from a smartphone via Bluetooth, for example, to the HiFi system and surround sound system ,- When used as a receiver, up to 8 transmitters can be stored and the audio signal can be received simultaneously by a BT device ,- Can be paired with any Bluetooth-compatible device (e.g. headphones, loudspeaker) ,- Audio input via supplied 3.5 mm audio cable ,- Bluetooth 4.1 (supports A2DP Bluetooth profiles) ,- APTX technology: for better audio quality despite limited bandwidth with Bluetooth ,- Range up to 10 m ,- Integrated battery: simple charging at suitable USB chargers via the micro-USB charging cable - Connection: 3.5 mm Jack Plug ,- Max. Range: 10 m ,- Max. Operating Time: 9 h ,- Power Supply: Integrated Lithium Polymer Battery ,- Bluetooth Class: Class 2 ,- Bluetooth Version: 4.1 ,- Colour: Black ,- Productline: Essential Line 2 years legal warranty only