Introducing the most technically advanced and durable headsets ever manufactured by Califone. The Titanium™ series of Mac & PC?compatible stereo headsets will help optimize differentiated learning experiences with breakthroughs in safety, performance, comfort and durability. Headsets used in classrooms or libraries are constantly handled and worn throughout the school week. To keep them in top condition and clean, the Titanium headsets are the first headsets that can be washed in soap and water once their cord has been detached (the HPK-1530 and HPK-1030 models are not washable)! Once cleaned and thoroughly dried, simply reconnect the replaceable cord and the Titanium headset is ready for reuse. To help students learn what a safe volume level is when using a headset, the Titanium headsets are also the first to restrict the volume playback level to the ASHA and OSHA-recommended maximum of 85 decibels. There is a switch on the earcup to disarm this feature for students with special needs on the HPK-1030 / HPK-1530 and on the cord of the HPK-1010 / HPK-1510. The HPK-1550 / HPK-1050 models have inline volume control, but not the 85dB restriction. There is even a rechargeable model (HPK-1030).