HP 8447D Amplifier 0.1-1300MHz Hewlett Packard $235.00
Melles Griot Wide Band Amplifier $594.99
EG&G/ PAR 5210 ANALOG LOCK-IN AMPLIFIER Dual/2 Phase PRINCETON APPLIED RESEARCH $450.00
Rechargeable Voice Amplifier Microphone Headset Speaker Teacher Meeting Speech $15.33
Mini Voice Amplifier Portable Bluetooth Speaker with UHF Wireless Microphone Hea $40.00
KEYENCE LR-TB5000CL Laser Sensor with Built-in Amplifier $289.99
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