HOTOR 3.5mm Bluetooth Audio Receiver Adapter for Speakers Car Audio Mp3 Mp4 Player Bluetooth version: Supoort Bluetooth V3.0.Super clear and flow conversation effect. Supoort A2DP stereo profile.10 meteres range connection. Wireless music receiver connects to 3.mm headphone jacks. Operating time: Up to 8 hours.Sleep mode for power saving. Hand-free call answering function.