The Tracker IV Combo includes the Tracker IV detector, headphones and a carry bag. Two-tone audio discrimination separates pull tabs from coins and silver. Streamlined in appearance, with only two operating controls and a mode selection switch, the Tracker IV has eliminated the most difficult aspect of metal detector operation: ground balancing. With built-in Automatic Ground Trac®, the Tracker IV™ balances for mineralization while you detect. Each has a sensitivity adjustment and motion all-metal mode, along with an 8" waterproof coil system. Every unit has a low-battery indicator, an internal speaker system and S-rod handle system. Five-year limited warranty. Made in USA.