12 Garrett Metal DetectorsSEARCH MODESThe AT Pro includes six detection modes: three Standard(STD) Modes and three Professional (PRO) Modes. It isrecommended to begin searching with one of the StandardModes to become familiar with the AT Pro before switchingto the more advanced audio features provided by the ProModes.Tap the Mode button to scroll through the six modes:the modes are Custom, Coins or Zero in the STD Mode andCustom, Coins or Zero in the PRO Mode.• Overview of STD Mode vs PRO ModeIn its Standard (STD) Mode, the AT Pro provides a full-strength audio response regardless of a target’s amplitude.Many detectorists prefer this consistent, unambiguous, binary(either on or off) target response. The AT Pro's Standard Modeoperates in this clean, binary response format in which thetarget's dominant conductivity is reported by a single tone.This mode offers "quieter" or more stable operation and ispreferred by many beginners.For those who want to hear more target information,Garrett offers a Pro Mode. The benefits of operating in ProMode include the ability to hear a target's size and depth viathe Proportional Audio and conductivity changes via ToneRoll Audio. Pro Mode also offers faster recovery speed forseparating adjacent targets. The advanced audio features ofPro Mode are intended for more skilled users who wish tohear the true signature of targets versus the simpler targetresponse provided in STD Mode.