The AERLANG Deep Tissue Massage Gun with Heat is designed for pain relief and percussion massaging. It is cordless and powered by a rechargeable battery with a 6.0-hour charge time. The compact size of 10.28x9.02x3.5 inches makes it easy to use for self-massage on the whole body. The modern design in carbon color features a plastic material construction, perfect for providing deep tissue massage therapy. This massage gun from Aerlang includes a lithium ion battery with 3 cells and comes with batteries included for convenience.