The ergonomically designed PR40 is the only battery pruner on earth with 7 internal sensors, allowing for a strong and extremely accurate progressive cut. The pruner and battery pack can be quickly configured for either right or left hand operation. The Lithium Ion battery pack includes a digital display showing battery life and the total number of cuts for the pruner. An audibile warning system alerts the operator to certain functions of the pruner. Long lasting battery pack for all day use. Depending on diameter and hardness battery life per charge is up to 15 hours and in average .750" diameter green material, up to 20,000 cuts per charge.