Students won’t worry about sharing when they use a super affordable Hamilton personal educational headphone, now in four different styles. Choose from our standard foam ear cushioned HA2 or HA2V with volume control. Upgrade to our leatherette cushioned MS2L or our MS2LV with volume control. These are the first headphones designed to combat the spread of head lice in schools. Each headphone comes in its own heavy-duty, write-on, reclosable bag. When sealed kills lice in 24-48 hours without the use of chemicals. Featuring Hamilton’s exclusive patented ASM™ automatic stereo/mono technology. Operates in 1/8 inch stereo, 1/8 inch mono, 1/4 inch stereo or 1/4 inch mono modes. Cobalt magnet drivers provide high-fidelity stereo sound. Refresh kit available includes a replacement reclosable storage bag and two new ear cushions. Impedance: 170 Ohms; Frequency response: 18-20k Hz. Cord: 2 meters. Speaker drivers: 40mm. Weight: 5 Ounces. Full one year warranty.