Ugreen (40854) Bluetooth 4.2 Receiver 3.5mm APTX AUX Adapter for Headphone Speaker Music Wireless Bluetooth 3.5 Jack Audio Receiver aptx Broad compatibility-- Upgrade your non-bluetooth devices via 3.5mm cable adapter(not included) to wireless audio devices: Smart phone,Laptop,Tablet,Music player. Turn bluetooth function to headphone-- Operation up to 10M in an open air condition. Compact pen-clip design: Make calls and listen to music via a Blurtooth 4.2 wireless connection. No more audio delay-- With aptX function, you can listen to high-clarity sound in perfect synchronization. Built in extra long battery--Experience a super long working time after only 2 hours of charging. 2 hours full charged, 4-5 hours music play. Package including: 1*Bluetooth 4.2 receiver; 1*100cm micro USB charging cable