Lovebay Bluetooth Receiver, Bullet Style Mini Bluetooth V4.1 Music Receiver Adapter 3.5mm AUX Audio Smart Wireless Bluetooth Car Kit for Home Speaker Headphones Computer With this wireless receiver adapter to listen music, phone calls and GPS when you are driving. Use it connect 3.5mm headphone jack to make your headset become wireless Bluetooth headphone. Just one second to make your speakers become Bluetooth speaker. Small and exquisite special deign to bring you new audio-visual feast. Working time: Music 5 hours/Talk 5 hours. Size:5X1.2CM.