Rocketfish RF-SPX15 Stereo Bluetooth Wireless Speaker Compatible with most MP3 players, computers, mobile phones and tablets: For use with more than one device. Pairs and plays in seconds: Via Bluetooth v2.1 wireless connection (AZDP, AVRCP, HFP and HSP) for quick setup with compatible devices. Up to 33' range offers flexible use Dual function as speakerphone: With call waiting capability allows you to take calls easily Built-in rechargeable lithium-ion battery: Provides up to 10 hours of battery life Ambient noise reduction: Reduces background noise for improved clarity