Superlux HD660PRO 150Ω version wired headphones

Superlux HD660PRO 150Ω version. Used about 3-4 times, less than 10 hours total, and looks brand new.

It's a closed-back type with an impedance of 150Ω, so the noise floor is very low, and the sound is transparent, without any noticeable white noise.
I think the sound is relatively rich (personal opinion).

The fit is soft, and the clamping force is comfortable for the average adult male head size, not feeling tight. Also, it doesn't slip even when you tilt your head down.
The pads are comfortable velour, with a luxurious feel and touch that's unexpected for this class.

The cable is 2.5 meters long, single-sided.
According to the manufacturer, the weight is 315g excluding the cable.

This headphone can be driven even by underpowered amplifiers, DAPs, or smartphones that can't sufficiently drive 300Ω headphones.
I put it away for a while after purchasing another headphone, but I confirmed that it works without any problems.
Please note that it may not be driven at a sufficient volume with very low-output smartphones.
Of the two included accessories, the carrying case is unused and included, but the 3.5mm to 6.3mm adapter plug is missing.