LG S740t Bluetooth Stereo Head Set with mp3 and sd card support

Features: LG Tone S740T Bluetooth Stereo Headset With MP3 And SD Card support Model No: S740T Support Agreement:HSP V1.2;HFP V1.6;A2DP V1.2;AVRCP V1.4 Support APTX audio codec solution Range of Frequency 2.4G to 2.4835GHz ISM Band Support 2 mobile phones at same time TF card support:128M~32GB Music Format MP3/WMA Auto-reconnect PC Interface USB 2.0 Rechargeable lithium battery 200mAh Bluetooth Version: 4.0+EDR Fit Design: Neckband Earpiece Design: Canal Earbud Connectivity: Bluetooth Wireless Talk Time: Up to 15 hours Music Time: Up to 10 hours Standby time: Up to 15days Operation distance: 10m TF Card Support: 128M~32GB