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5mm 4-pin TRRS plug
the NC-181 delivers reliable performance at an affordable price
AV equipment and language lab setups
This **8‑station listening center** bundle comes with 8 HA2 school headphones and an 8‑position jackbox
Battery life: 36 months 8Keyboard battery life calculation based on an estimated two million keystrokes/year in an office environment
LH-55 Classroom Headphones 500 Student Pack replacement-part 5mm 4-pin TRRS plugLH 55 Classroom Headphones 500 Student Pack is a value focused audio solution designed specifically for schools that need reliable headphones for classroom instruction, testing, and everyday learning. Built for large scale deployment, these lightweight over ear headphones deliver clear stereo sound, a comfortable adjustable fit, and broad device compatibilitymaking them an ideal choice for cost conscious classrooms and school programs. At a glance