Ridgid 21893 Seek Tech SR-20 locator traces any frequency from 10 Hz to 35 kHz

Ridgid 21893 Seek Tech SR-20 locator
A lightweight yet rugged receiver that provides all the information needed for faster, more accurate locates
Target line and guidance arrows quickly identify distortion
Proximity signal and signal strength help work through difficult locates 
Trace any frequency from 10 Hz to 35 kHz
Specs:
Active Line Trace Frequencies 128 Hz, 1 kHz, 8 kHz and 33 kHz
Passive Power Trace 50 Hz, 60 Hz, <4 kHz Broadband
Passive Radio Trace 4 kHz-15 kHz, 15 kHz-36 kHz
Sonde Frequencies 16 Hz, 512 Hz, 640 Hz, 850 Hz, 8 kHz, 16 kHz, 33 kHz
Power Source 4 C-Cell batteries (included) or Rechargeable RIDGID® Professional 18V battery with RIDGID SeekTech® 18V Adaptor (optional)
Battery Life Varies with battery rating, use and operating factors
Four size C, alkaline batteries provide approximately 10 to 15 hours
RIDGID® Professional 18V battery provides approximately 18 to 22 hours
Weight 3.5 lbs. (1.6 kg)
Meets FCC Class A and EN 55022 Class A requirements
* 30 user definable frequencies can be set from 10 Hz to 35 kHz