... , full of electricity, the maximum volume play can reach 2.5 hours.6. SD card, MMC card ... back, to turn on the power ON, power OFF.2. Status LED: power on, the switch has a ... players, computers, etc), to amplify, as a power amplifier using; note: when you insert the connector machine ... . Computer speakers: card speaker2. Hosting power: 3W3. Bass diminution: 68 (dB)4. Peak power: 12 (w)5. High frequency ...