Product details:

Recommended Battery: AK 20
Recommended Charger: AL 101
Power Source: Battery
Bar Length: 12"
Chain Type: 1/4" PM3
Chain Oil Capacity: 109cc (3.7 oz)
Runtime (w/ AK 20) Up to: 40 minutes
Voltage: 36V
Stihl Chain Loop Fit: 71PM3 64 (3670 005 0064)