Troy-Bilt Cordless Trimmer JumpStart Engine Starter Simply plug it into your string trimmer, blower or other compatible tools and press the button to start up in seconds. Features a rechargeable 12 volt lithium ion battery (charger included). Produces 40 cranks on a single charge. Swinging gate carabineer included for easy access. Compatible with all JumpStart capable Troy-Bilt products as well as prior Press2Start capable products.