Bluetooth ® audio streaming capability. One-touch Bluetooth ® pairing with Near Field Communication (NFC). Portable, go-anywhere sound. Speakerphone functionality with smartphones. Up to 20-hours playback via dry cell (four AA) batteries. Two-way power supply with AC adaptor included. Connector / Port / Interface: 3.5 mm Jack; Bluetooth ®; Output: 4 Watts (2@2W); Depth: 3 1/2"; Drivers: Full-Range Speaker 1.96".