LevelOne CLLSPKPCARS, Universal, Silver, MicroSD (TransFlash), 83 dB, 2.5 W, 80 - 20000 Hz LevelOne CLLSPKPCARS. Device type: Universal, Product colour: Silver, Compatible memory cards: MicroSD (TransFlash). Sensitivity: 83 dB, Output power: 2.5 W, Frequency range: 80 - 20000 Hz. Interface: USB/Bluetooth, Connectivity technology: Wired & Wireless, Bluetooth version: 3.0+HS. Power source type: Battery, USB, Battery technology: Lithium-Ion (Li-Ion), Battery capacity: 500 mAh. Width: 73 mm, Depth: 57 mm, Battery weight: 9 g