Power consumption ≤ 9W., image rotation: 360°, Charger: 15V 2A, Spectrum analysis: Yes, Item Name: HD588 Monitor, Frequency: 5.8G 64CH, Contrast: 1000 CR, NTSC/PAL auto selection, Latency: 90ms, Display: 1920x1200p full HD, Sensitivity: 95dBm, Build in Battery: 2400mah Li-ion battery, Input Voltage: 12V 2A, FOV: horizontal 85°/85°(Left/Right), Brightness: 450cd/m2, RF receiver switch: OFF/ON/L/R, Auto brightness: yes, vertical 85°/85°(Up/Down), Wide Voltage: 8~28V, LED backlight, Recording: auto save, DVR Resolution: 1280*720P.
Just check coupons out (with price alert and history). You probably want to know 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 coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($150.87): Parts8
2. ($153.99): BGFPV-10
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGZASD1, 2019SPEDM, bgssaff9, BGBCFPV, BGBCBG10, BGBFAFF2019, BGCITYADS2019, BG409412, bGhOnEy10, BGTT10
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Aomway HD588 V2 FPV HD Monitor [EU] ($-3)
Price history and price alert
Price history (for all/most countries) for Aomway HD588 V2 FPV HD Monitor is here. The lowest price was: $129.9.
Price records source(s): 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)).