FPV is made possible thanks to two links, a control link, and a video link. Without an Power Meter, a pilot has no way to test these critical links. Test equipment formicrowave (GHz)links is not cheap. changed this several years ago and provided their'Power Meter v1'to the FPV community. The v2 is the result of listening tocustomer feedback. added an internal battery, an internal attenuator, and other features that every FPVer needs. lntegrated Li-ion Battery The v2 contains an integrated Lithium battery, which power the meter for at least 8 solid hours. With auto-shutdown after periods of inactivity, a single charge power your meter for days at the race track. Recharged using a standard micro-USB connector in less than one hour. lntegrated Li-ion Battery The v2 contains an integrated Lithium battery, which power the meter for at least 8 solid hours. With auto-shutdown after periods of inactivity, a single charge power your meter for days at the race track. Recharged using a standard micro-USB connector in less than one hour. Power Level : -20dBm up to +30dBm Calibrated Frequencies: 35,72,433,1200,2400,,5600-6000MHz in 50MHz stepsAccuracy : +/- 0.5dB Attenuator: 30dB (Internal) Battery : 3.7V Lithium cell, 10440 size,60OmAhCurrent Consumption: -35mA Battery Life: -8 hours Auto Shutdown: 5 minute timeoutCharging: micro-USB cable Display: OLED, 128x64 pixels,monochromeUser Input: Joystick lnterfaces: USB, power control via cDc Antenna: 5.8GHz'Sniffer Antenna' (linearly polarized -2dBi dipole)Adapter: Male to Male SMA adapter (Due to the light and angle, there is a slight color difference, which does not affect the use) Color: Red Material: Metal+Plastic Package Contents: 1 * frequency tester set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.