【2×21V large capticty battery】This chainsaw is equipped with 2 rechargeable 21V 4000mAh batteries. This chainsaw can provide long-lasting and stable power output, and you can switch to the backup battery when the power is exhausted. Get rid of the cord shackles.【Multiple Safety Protection】1. The safety lock prevents the electric saw from starting accidentally, and the safety button and switch must be pressed at the same time to start. 2. The safety shield prevents sawdust from flying around. 3. A pair of gloves ensures comfort and safety when operating the device. Safety; 4. A pair of safety glasses protects your eyes from sawdust. 5. The additional non-slip front handle helps you hold the chainsaw firmly.【Package List】1 cordless chainsaw, 2×21V high-capacity batteries, 2 chains + 1 guide bars (one pair already installed on the saw), 1 Ce fast charger, 1 wrench, 1 pair of gloves, 1 pair of goggles, 1 bottle of oil, 1 instruction manual, 1 storage box.