HamiltonBuhl LCP-12FVBL Lab Pack Designed with busy classrooms in mind and ideal for use in schools libraries and computer labs this HamiltonBuhl Lab Pack includes 12 blue Favoritz stereo headsets with in-line microphone and 3.5mm TRRS plug. Each headset comes in its own heavy-duty anti-lice write-on moisture-resistant resealable bag. The compact lockable carry case (lock not included) makes transporting and storing all 12 headsets easy and convenient.