Panasonic DVC Cassette AY-HDV186AMQ Professional full-size DV videocassette with 186 minutes of recording time in SP mode S-AME (Super Advanced Metal Evaporation) technology, employed yields a higher magnetic density, providing +1.2dB higher output vs. the competition 30% fewer dropouts than the competition Dry-type lubricant and thick DLC (Diamond-Like Carbon) film development boosts durability for high speed shuttling, still-frame and professional editing. A surface treatment process further reduces the chance of a head clog, while keeping output high and bit error rate low. Stable tape transport and significantly extended head life