you can re-calibrate the pinpointer by briefly pressing the button while away from any metallic source

All current Garrett Metal Detectors including ACE 200

Pinpoint - Yes

greater Target ID resolution

Garrett MS-3 Z-Lynk Wireless Headphone KIT with Pro-Pointer AT Z-Lynk Pinpointer for Garrett AT PRO, ACE 400, ACE 300 Digging Tools you can re-calibrate the pinpointerTake your Garrett AT PRO Wireless with the Garrett Z Lynk Wireless Kit with MS 3 Headphones and Wireless Pinpointer! Also works with Garrett ACE 400, 300 or any detector with 1 4" headphone jack! Here is what you will receive: Garrett Pro Pointer AT Z Lynk Wireless Waterproof Pinpointer with Holster Garrett MS 3 Z Lynk Wireless Headphones WT 1 wireless transmitter 2 pin AT connector to Micro USB cableconnects AT detector to transmitter " Jack to Micro