brand new and high quality. Features: Only be applied for Yaesu FT-857/FT-897. Clearly displays The automatic level control voltage, modulation level, standing wave ratio and supply voltage. High performance and super stability. And Easy to operate. Receive Display Settings: 1, press [FUNC] for key to enter the setup menu, enable the extended menu. 2, rotate [SELECT] to call up the setup menu item No-060 [MTR ARX SEL]. 3, rotate [DIAL] to select an external instrument display: SIG: the input signal strength display CTR: Discriminator Center Meter VLT: battery voltage N / A: blank FS: buckle in the instrument 1mA full scale output signal calibration standard external instruments OFF:Turn off the meter. 4, press [FUNC] button to save the settings and exit the setup menu. Emission Display Settings: 1, press [FUNC] for key to enter the setup menu, enable the extended menu. 2, rotate [SELECT] to call up the setup menu item No-061 [MTR SEL]. 3, rotate [DIAL] to select an external instrument display: PWR: transmit power display ALC: Automatic Level Control voltage display MOD: Modulation Level Display SWR: SWR display VLT: Display Supply Voltage N / A: blank OFF: Turn off the meter. Calibration method is as follows: 1, press [FUNC] for key to enter the setup menu, enable the extended menu. 2, rotate [SELECT] to call up the setup menu item No-060 [MTR ARX SEL]. 3, rotate [DIAL] to select FS. 4, with a small flathead screwdriver to adjust the calibration adjustment hole rear, so the header pointer to full scale. Specifications: Material: ABS Size and Color: As pictures shown Quantity: 1 Pc Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x SWR Power Meter (other accessories demo in the picture is not included.)