in-line beltpack audio line tester / test-tone generator
single 9V alkaline battery
built-in, with volume control
Tone Generator
tone_generator
test tone, three output levels (mic/line)
2x XLR, 1/4" jack (line-in or 2k ohm earpiece out), headphone output
SOURCE (tone/mic at mic or line level), MONITOR switch, SPLIT switch
LEDs for phantom / intercom power presence
Every field carries its own trust-tier: core data is confirmed by the manufacturer, peripheral data — by AI (with a source link). Safety-critical parameters (load ratings) are never published below vendor-claimed — a liability requirement.