Makita® once again breaks new ground with the new cordless XGT® 70 lb. Breaker Hammer giving users a powerful and portable tool that can demolish up to an 8' x 6' x 4" thick 5000 PSI concrete slab using two fully charged 40V max XGT® 8.0Ah Batteries (BL4080F). The GMH04 features Anti-Vibration Technology (AVT®), which is an internal counterbalance system along with vibration-absorbing handles that work together to reduce up to 30% less overall vibration*. It also features Auto-start Wireless System (AWS®), which utilizes Bluetooth® technology for wireless power-on/off communication between tool and dust extractor (AWS® Transmitter sold separately). The 70 lb. Breaker Hammer also features Extreme Protection Technology (XPT™), engineered for improved dust and water resistance for operation in harsh conditions. The GMH04 delivers up to 70% faster breaking than corded* and is the most powerful cordless breaker in its class.