CredDeal Wireless Portable Bluetooth Audio Transmitter and Receiver 2-In-1 Adapters for Audio Devices of Home Audio, Ipod, DVD/CD Player, TVs Fit for all 3.5mm Media Devices Enable bluetooth Switches freely between Bluetooth Trasmitter(MP3, DVD/CD, Home Audio) & Bluetooth Receiver(Headphone etc.) Trasmitter Working Time: Up to 11 hours, Receiver Working Time: Up to 6 hours