12 Volt & 24 Volt. 44Ah, 3000 amp peak, 1200 CA, 680 CCA. Maintenance mode on 240 volt recharge; unit can be left on charge indefinitely. Extra long 1.6m copper cables, H/D clamps with LED lights. Polarity alarm, surge protection. 12v power socket. 4 amp fast chargers 12v = 4.5 to 6 hrs., 240v = 10 to 12 hrs. Running time 8.5 hrs. (12v) & 4 hrs. (24v) @ 4.5 amps. Chargers included.