Maximum compatible headphone dimensions (inside): 8.4 x 6.6 x 2.1 inches. Compatible with wired / wireless headphones. The engineered ultra-hard shell helps protect against drops, impacts, and crushing. The soft interior maximizes headphone protection in the case. An internal mesh pocket conveniently stores cables, cords, chargers, AMP, earpads, adapters, and other accessories. Compatible with AKG Y50BT, Y500, Y45BT, Y400, Y40, Q460, N60NC, AKG K490NC, K452, K451, K450, K430, K420, K404, Sennheiser PC8, PC7, SC165, Logitech H820e, H800, H390, H540, H570, Truck Driver Headset, Call Center Headphones, and Office Bluetooth Headset case. A practical replacement or upgrade for the original headphones case