Product advantages: A new adjustment system of the tension of the chain without tools. Mechanical chain brake and electric motor shutdown system for added security. Adjustable flow rate of the oil pump. Automatic chain oil lubrication with an indicator light for the oil level. A hook for hanging up the tool temporarily. Electronic protection against power surges and deep discharges of the battery. Possibility to adapt a toothed rod (optional). Technical Details: Battery composition: Chemical Li-Ion battery, voltage 36V - 2 x 18V. Number of batteries included 0. BL1840, BL1830 linear velocity or speed of chain 8.3 m/s. Chain oil tank autonomy 0.085 litres. Nominal length of the guide chain 25 cm. Chain Type 492/91PX. Chain pitch 3/8 inches. Number of chain links 40; gauge 1.3 mm. Exposed vibration levels 3AX. Wood cut (Ah) 4.7 m/s². Sound range uncertainty (K) 2.5 dB (A). Margin of uncertain vibration (K) 1.5 m/s². Sound pressure level (LPA) 84.4 dB (A). Sound power (LWA) 95.4 dB (A). Overall dimensions (length x width x height) 545 x 234 x 198 mm. Net weight 4.1 kg. Machine dimensions (length x width x height) 316 x 234 x 198 mm. Accessories of the series: 1 chain - 25 cm, 1.3 mm, 3/8 inches. 91PX 1 star guide 25 cm 3/8 inches, 1.3 mm.