Turns any device with a 3.5mm audio jack into a receiver for Bluetooth audio signals. The receiver transmits music, for example from a smartphone, via Bluetooth to a non-Bluetooth-enabled device such as headphones, speakers, HiFi systems, and surround sound systems. Up to 8 audio sources can be stored, with the audio signal being received by only one Bluetooth device at a time. The battery life is up to 9 hours. It can be paired with any Bluetooth-enabled device, such as smartphones. Additionally, it allows control of key functions of the paired device, such as volume and song tracking (if supported by the device). Hands-free calling is possible thanks to the built-in microphone. The hands-free functions can be controlled via a multifunction button, allowing you to answer, reject, or end calls, redial, and activate voice dialing (if supported by the device). The built-in battery can be easily charged with suitable USB chargers via a micro-USB charging cable. Perfect for portable use thanks to its compact size, which is the size of a matchbox at 44 x 44 x 15 mm and weighing just 15 g. It also features a handy clip for easy attachment. System requirements: Bluetooth-enabled audio source.