433, monochrome User Input: joystick Interfaces: USB, 72, 5600-6000MHz in 50MHz steps Accuracy: +/- 0.5dB Attenuator: 30dB (internal) Battery: 3.7V li-ion cell, 1200, 128x 64 pixels, 2400, 320mAh Current Consumption: 35mA Battery Life: about 8 hours Auto Shutdown: 5 minutes timeout Charging: Micro USB cable Display: OLED, power control via CDC Antenna: 5.8GHz “Sniffer Antenna” (linearly polarized 2dBi dipole) Adapter: Male to Male SMA adapter, Power Level: -20dBm up to +30dBm Calibrated Frequencies: 35, 10440 size.
Basically copy coupon, view price history or create e-mail price alert. What is the best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Hong Kong.
Link: Banggood product page
1. ($92.00): Email5
2. ($92.07): aff7off
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): e2bcea, 67356a, 65d613, 502C6B, BGBCFPV, BGBCBG10, bgchinafest, BGBFAFF2019, BGCITYADS2019
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for V2 ImmersionRC RF RC Power Meter. The lowest price was: $67.14.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).