Transmitter Power: 25mW / 200mW (Out of the box) (1W Capable), Operating Temperature: 32˚F-104 ˚F (0˚-40˚C), Antenna Interface: Secured U.FL, Mounting Pattern: 30x30mm M3 holes, Dimensions: 40x42x10mm, Video In Secured: MIPI, Operating Frequency: 5.725-5.850GHz, SmartAudio: Yes, Input Power: 7-17V, Power Consumption: 6-15W, Model: HDZero Freestyle VTX, MSP Canvas Mode: Yes, Weight: 28g.
Basically copy coupon, view price history or create e-mail price alert. What is 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 China.
Link: Banggood product page
1. ($99.99): BG10fpv
2. ($100.09): Cuponation9
3. ($101.19): BGRCParts8
you should apply the coupon 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): Tabby20, BGFPV10, BGRCT10, DealBGimpact
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for HDZero Freestyle Digital HD VTX RC Video Transmitter. The lowest price was: $98.99.
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)).