SIHOO M57 B112 GREY ERGONOMIC OFFICE CHAIR Mouse Connectivity technology: wired

Connectivity technology: wired

such as steel frame

Impedance at 1KHz 32ohm +/- 15%

Music and Movie three modes for multiple usage and outstanding sound effect

it is easy to disassemble and tool free

SIHOO M57 B112 GREY ERGONOMIC OFFICE CHAIR Mouse Connectivity technology: wiredHIGH QUALITY & EASY TO ASSEMBLE SIHOO office chairs have been certified by BIFMA and SGS, passed 2000lbs static pressure test. It can carry a weight of up to 330lbs. Every part of this computer office chair has strict safety quality testing, cushion impact test, handrail fatigue test, chair foot static pressure test, ect. Simple instructions enable anyone to put chair together in eight simple steps! FOR LONG TIME SITTING The mesh back and mesh seat