Ultrasone Pro 900i Closed-Back Headphones (Open Box, Missing Packaging) ISONG Wireless charging gives you total

Wireless charging gives you total freedom from cables

The only difference to the F-type is the material used for the portion that comes in contact with the skin

Headphone Transducer type: Dynamic

Bearing Resistance: 7~8KGF-CM

and a full-spectrum uplift that will captivate even the most discerning ears

Ultrasone Pro 900i Closed-Back Headphones (Open Box, Missing Packaging) ISONG Wireless charging gives you totalUltrasone Pro 900i Pro Quality Sound: Large 40mm titanium plated drivers provide exact sound reproduction. Combined with Ultrasones S Logic Surround Sound Technology, this puts you right into the center of the music. Safer Listening: In addition to providing a realistic sonic experience, the S Logic technology provides the same loudness sensation as other headphones, with an up to 40% lower dB output. This lets you set the volume lower on your music