Amazon Mpow  
Mpow Bluetooth 4.1 Aux Adapter for Car / Home Stereo System with One-Key Button for 1s Turn On/Off, 11 Hours Bluetooth Wireless Receiver / Car Kits with 3.5mm Aux Stereo Output for Hands-free Calling
ONE-SECOND SWITCHING BUTTON BLUETOOTH ADAPTER: Designed with humanized ON/OFF button and widened volume/track control on the side for quick and convenient control for your talking and listening experience.( Note 1: Mpow will auto-off if it is disconnected for 5 minutes to save energy; Note 2: Please turn Mpow on manual for this Mpow would not turn on automatically with your car starting.)
UPGRADED MPOW BLUETOOTH 4.1 RECEIVER: Designed for saving non-Bluetooth Speakers / car / headphones stereo system to enjoy crystal clear music with HFP/HSP/A2DP/AVRCP/CVC6.0 & hands-free calling with built-in micphone.
DUAL CONNECTION: With the multipoint technology, Mpow Bluetooth car kit can connect 2 Bluetooth devices at the same time for enjoying your music while won't miss any calls.
11H CONSTANT AUDIO STREAMING MPOW: Built-in rechargeable battery provides up to 120Hrs standby time and 11Hrs audio feast after fully charged for only 1.5 hours. You can also continue to power your Bluetooth receive with additional charging cable.(Note: Charging Mpow with DC 5.0V & no quick charger.)
WIDE COMPATIBILITY: Stream music wirelessly through most home audio systems, car stereo system, and wired headphones from Bluetooth enabled devices like smartphones, tablets, MP3 players, etc.
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