Hand Free Grunter Game Call 1503607. It operates hands-free when attached to outer clothing allowing uninterrupted movement for gun or bow hunters. An adjustable O-ring and expandable range extender tube help control tone volume and call depth. Inhale-activated operation prevents reed freeze-up or sticking and includes an automatic shutoff for consistent performance. Specifications for Heater Body Suit Hand Free Grunter: Manufacturer: Heater Body Suit Color: Black Features of Heater Body Suit Hand Free Grunter: Hands-free operation when attached to outer clothing Produces buck doe and fawn vocalizations Adjustable O-ring for call tone selection Inhale-activated reed design Reed will not stick or freeze Automatic shutoff feature Adjustable volume control Expandable range extender tube Quick-pin body mount for bow or gun setups Package Contents: Heater Body Suit Hand Free Grunter