This unit has had the revised THD 16ohm rheostat fitted which provides a smoother sweep and less crackle from the pot

The THD Hotplate 16 Ohm Power Attenuator is a high-quality accessory designed specifically for guitar amplifiers. With an impedance of 16 Ohms, this product is suitable for all amplifier types and is part of the THD Hot Plate product line. The THD brand is known for producing reliable and innovative musical instruments, making this power attenuator a great choice for guitarists looking to regulate their amplifier volume effectively.

I’ve had this unit for years now and it works great
Just upgraded to a Fryette so no longer needed
Great bit of kit for reducing a loud amps volume to manageable levels
Thanks for looking