Where do i find the pdf manual for this product?

This site might help you out. Otherwise I would be OK with copying mine and emailing it to You. https://www.youtube.com/watch?v=v44lCcWfR0g Ray in AZ

Does the rj45 tester test the 8 wires plus the screen? i.e. all 9 conductors in stp cables?

The RJ45 connection does not test the ground. However, if you touch metal components of each RJ45 connector on the cable to the metal rings around the 1/4" testers, then the ground should tone out if it's connected.

Will this test cables with different connectors on each end? for example, a trs to xlr adapter cable with 1/4" trs on one end and xlr on the other?

Yes, you can test cables with two different type connectors at the same time.

Where (in what country) is this made?

The OSP CT-04C is manufactured in China.

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Elite Core OSP CT-04C Cable Tester, Speaker

Elite Core OSP CT-04C Cable Tester, Speaker

Product ID: 17128761

Details

Brand
O.S.P
Color
Yellow
Item Weight
1.84 Pounds
Item dimensions L x W x H
8 x 5 x 3
Power Source
Battery

🔋Battery powered, portable

🔌Multi-connector support

🛠️Heavy-duty metal build

Description

🔧 Plug in, power up, and never miss a beat with the ultimate cable tester!

COMPACT PORTABLE DESIGN - Lightweight 1.84 lbs unit fits easily in your toolkit or gig bag for on-the-go testing
RUGGED METAL CONSTRUCTION - Built tough to survive the rigors of professional audio and network environments
UNIVERSAL CABLE COMPATIBILITY - Test XLR, TRS, Speakons, MIDI, RCA, USB, DMX & more with one device
DEDICATED 9 WAY SELECTOR SWITCH - Quickly toggle between cable types without fumbling or guesswork
INSTANT LED CONTINUITY FEEDBACK - Visual confirmation of each conductor’s connection status for flawless troubleshooting

The Elite Core OSP CT-04C Cable Tester is a professional-grade, battery-powered device designed to verify continuity and connections across a wide range of audio, network, and MIDI cables. Featuring a rugged metal housing, a 9-way selector switch, and LED indicators, it supports 1/4 TRS, XLR, Speakons, RCA, MIDI, USB, RJ45 CAT5e, and DMX cables. Compact and portable, it’s an essential tool for audio engineers, technicians, and network pros seeking reliable, on-the-spot cable diagnostics.

Specifications

ASIN	B004PDJV08
Best Sellers Rank	#51,030 in Musical Instruments ( See Top 100 in Musical Instruments ) #1,647 in Microphone Cables
Brand	O.S.P
Brand Name	O.S.P
Color	Yellow
Compatible Devices	speaker
Customer Reviews	4.5 out of 5 stars 164 Reviews
Global Trade Identification Number	00759681003441
Item Dimensions	8 x 5 x 3 inches
Item Weight	1.8 Pounds
Item dimensions L x W x H	8 x 5 x 3 inches
Manufacturer	Elite Core Audio
Measurement Type	Ohmmeter or Continuity Tester
Model	CT-04C
Part Number	CT-04C
Power Source	Battery Powered
UPC	759681003441
Unit Count	1 Count
Warranty Description	1 year.

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