Specifications:

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• Sensitivity: 80 uA
• Display: Analog instrument
• Input Impedance: 10 K-ohm
• Power Supply: 12 - 13,8V DC
• Power consumption: 50mA
• Connection: 3,5mm Jack
• Dimensions WxHxD: 170 x 80 x 80 mm
• Weight: Approximately 600g

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Needs a CB radio with output for external S-meter !