【Compatible with Popular 20V Battery Systems】This mini chainsaw is designed to work with widely available 20V batteries, allowing you to use existing power tools batteries you may already own. The package does not include battery or charger, providing flexibility for users who prefer to use their preferred brand. This compatibility helps reduce additional costs and makes the tool more accessible. 【Versatile Dual-Size Cutting Capability】Experience versatile cutting performance with our innovative 2-in-1 design that accommodates both 6-inch and 8-inch chains. The package includes four high-quality chains (two of each size) to handle various cutting tasks without needing multiple tools. Whether you're trimming tree branches, pruning bushes in your backyard, or cutting small logs for firewood, this saw provides the right chain for every job. The spare chains ensure continuous operation and reduce maintenance downtime. 【Powerful Brushless Motor Technology】Equipped with an advanced brushless all-copper motor that delivers superior performance compared to traditional brushed motors. Enjoy higher working efficiency, faster cutting speeds reaching up to 36 feet per second, reduced noise levels during operation, and extended lifespan with lower maintenance requirements. Built-in overload protection and thermal safeguards prevent damage from excessive use, ensuring reliable performance even during demanding tasks. 【Automatic Lubrication System】The integrated automatic lubrication system maintains optimal chain performance without manual intervention. Simply fill the oil reservoir with your preferred lubricating oil (compatible with all standard brands), and the system will gradually distribute lubrication during operation. This feature ensures smoother cutting action while significantly extending chain life and reducing friction-related wear. 【Tool-Free Installation & Adjustment】Designed for user convenience with completely tool-free installation and chain tensioning systems. Easily install or replace chains without specialized tools using the intuitive quick-change mechanism. The integrated rotary tensioning dial allows precise adjustment of chain tightness with a simple turn, maintaining optimal cutting performance throughout your work session. 【Lightweight Ergonomic Design】Weighing only 2.7 pounds (tool only), this compact chainsaw features an ergonomic handle with non-slip rubber grip for comfortable one-handed operation. The balanced design reduces user fatigue during extended use while allowing access to tight spaces where larger tools cannot reach. Suitable for users of all experience levels including those who may find traditional chainsaws too heavy or cumbersome. 【Battery Level Monitoring】Stay informed about power status with the clear battery level display integrated into the tool body. Monitor remaining runtime at a glance to plan your work sessions effectively and avoid unexpected interruptions due to depleted batteries. This feature enhances safety by preventing operations when power levels are insufficient for optimal performance.