How it works and what frequency?

As to the locator this information is available in the manual, as you have to adjust the sensitivity level whilst trying to find what you are looking for underground. Based on your need to locate adjusts the sensitivity level on the locator

Does it work under concrete

it will work well sounding under concrete as long as there's no rebar or metal shavings in it. Make sense?

Bosch 19 557 Magna Trak 100 Series Magnetic Locator

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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$1661.23

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Description

🧲 Locate Like a Pro, Never Miss a Beat!

READY FOR ANY TERRAIN - Water-resistant housing and included soft carrying case make it perfect for underground or wet site work.
LIGHTWEIGHT ERGONOMIC DESIGN - Only 3 lbs with an easy-grip handle for comfortable, all-day one-handed use.
ERASE INTERFERENCE STAY FOCUSED - Unique erase feature cancels out nearby metal noise like fences for clear signals.
SAFETY FIRST POWER LINE INDICATOR - Visual alert on LCD warns of nearby power lines to keep your worksite secure.
PRECISION DETECTION AT YOUR FINGERTIPS - Advanced LCD screen with audio tone for pinpoint locating in noisy environments.

The BOSCH CST/Berger Magna-Trak 102 is a professional-grade magnetic locator designed to detect ferrous metals such as pins, pipes, and tanks underground or underwater. Featuring a digital LCD bar graph and audio tone for precise detection, it includes a unique erase function to eliminate interference, a power line indicator for added safety, and adjustable sensitivity and volume controls. Lightweight and water-resistant, it’s built for comfort and reliability on any job site, complete with a soft carrying case for easy transport.

Specifications

ASIN	B000KAXN2W
Best Sellers Rank	#209,130 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #20 in Pipe Locators
Customer Reviews	3.9 3.9 out of 5 stars (167)
Finish types	Brushed
Included Components	Magna-Trak 102 Locator; Soft Carrying Case
Item Weight	0.16 ounces
Item model number	19-557
Manufacturer	CST/Berger
Product Dimensions	43.75 x 6 x 2.5 inches
Volume	2 cubic feet
Warranty Description	Product Defects Only

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