The 4aH battery bundle comes with one Hyper Tough 4aH batter along with The new Hyper Tough Lithium-Ion 12V Max* Brushless Oscillating Tool. This tool is suited for a wide range of jobs including: plunge cutting, trimming wood and floorboards, sanding down furniture, scraping adhesive, removing rust, and much more! The Hyper Tough Brushless series provides up to 30% more power, 10x longer motor life and 30% more runtime compared to standard brushed models. This tool delivers up to 20,000 OPM with a 3.2 degree oscillation angle, while delivering tool-free blade change for faster accessory changes. This oscillating tool has a variable speed trigger, 6-setting speed control dial, LED light, battery indicator lights, and 7 accessories. Also included is: (1) 1.5 Ah lithium-ion battery, (1) 3-5 hour battery charger, and a 2-Year Limited Warranty. Discover the entire family of Hyper Tough 12-Volt Tools and accessories exclusively at Walmart.