Lewitt are gaining a serious reputation for quality mics, I believe they are headed by a former top AKG techie..

Hopefully this info from a UK shop is correct:

Lewitt LTS 240 Specifications

Transmitters

Transmission principle - UHF, FM, diversity
Directional pattern - cardioid
Available channels - 4 selectable channels
RF carrier frequency ranges - 863 - 865 MHz
Modulation - FM (25 kHz max. deviation), compander system with pre- and de-emphasis
Audio bandwidth - 70 ... 18,000 Hz
THD - < 0.5% typical
Signal / noise ratio - > 85 dB-A typical
RF radiation - 10 mW
Battery life - 2 pcs AA size dry batteries, 10 hours typ.
Dimensions - 50 dia. X 262 mm, 1.96 dia. X 10.3 inch
Net weight - 258 g, 9.1 oz.
Receiver

Audio outputs - balanced 3-pin XLR, unbalanced TS 1/4" jack
Gain adjustment range - 0 - 6 dB
Squelch - yes
Dimensions - 160 x 115 x 30 mm, 6.3 x 4.5 x 1.2 inch
Net weight - 540 g, 19 o

Here's a manual - though not sure how informative...

https://www.manualslib.com/manual/880910/Lewitt-Lts-240-Dual-CPlusd.html?page=8#manual