Approx appSPBTB. System type: 2.0, Recommended usage: mp3 player. RMS rated power: 6 W, Frequency range: 20 - 20000 Hz. Connectivity technology: Wireless, Bluetooth profiles: A2DP, AVRCP, HFP, HSP. Power source type: Battery, Battery life (max): 4 h, Battery recharge time: 4 h. Width: 75 mm, Depth: 75 mm, Height: 75 mm