2.64 x 1.5 x 0.87 inches

Kastar Two Ni-MH Battery 1.2V 1000mAh Replacement for Sennheiser RS120 RS-120 RS130 RS-130 RS160 RS-160 RS170 RS-170 RS180 RS-180 RS195 RS-195 PXC 250-II PXC 350 PXC 450 HDR 170 Headphones