Educational Headphone

	HP-660 EDUCATIONAL HEADPHONE SPEAKER: 40mm SPEAKER, 600 Ohms SENSITIVITY: 100dB CORD: 5FT.COILED CORD PLUG: MONO 6.3mm NICKEL-PLATED L TYPE
	HP-660M EDUCATIONAL HEADPHONE WITH MICROPHONE SPEAKER: 40mm SPEAKER, 600 Ohms SENSITIVITY: 100 dB CORD: 6FT.STR. CORD PLUG: MONO 6.3mm NICKEL-PLATED FOR HEADPHONE MONO 6.3mm NICKEL-PLATED FOR MICROPHONE DYNAMIC MICROPHONE UNIT IMPEDANCE 200 Ohms
	HP-662 EDUCATIONAL HEADPHONE  SPEAKER: 40mm SPEAKER, 32 Ohms SENSITIVITY: 100 dB CORD: 6FT.STR CORD PLUG: MONO 6.3mm NICKEL-PLATED
	HP-662M EDUCATIONAL HEADPHONE WITH MICROPHONE SPEAKER: 40mm SPEAKER, 64 Ohms SENSITIVITY: 100 dB CORD: 6FT.STR. CORD PLUG: MONO 6.3mm NICKEL-PLATED FOR HEADPHONE MONO 6.3mm NICKEL-PLATED FOR MICROPHONE DYNAMIC MICROPHONE UNIT IMPEDANCE 200 Ohms