Output delay: 50-60ms, Battery: built-in 3000mAh Li-Po battery (continuous work for 4 hours), Supported system: Windows / Android / iOS, Data interface: USB / UART serial port data transparent transmission interface, Channels: 24 channels, Certification: FCC / CE standards, Supported device: HDIM display / mobile phone / tablet / computer (requires WIFI support 802.11n/ac), PWM: 6 sets of PWM signal output PTZ and other external equipment control, Modulation: OFDM, Transmission range (outdoor): standard antenna 1km, Charging port: type-c 5V charging port, Input/output interface: Mini HDIM, Size: (116.9 SMA connector included) 112.6*64.6*31.5mm / weight 220g, Input video format: HDIM full format up to 4K UHD @30, Frequency: 5.1GHz-5.8GHz, Encryption: 256 bit encryption, Operating temperature: -20°C~60°C, Compression ratio: HEVC 3A TV broadcast level, Output format: 1080P@30@60.
Basically copy coupon, view price history or create e-mail price alert. 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 price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($406.63): Parts8
2. ($406.63): BGDAVIS
3. ($431.99): BGFPV-10
apply it 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): BG10INSIGHT, BGCuponation10
(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 Insight Pro 1080P FHD Digital Wireless Transmission RC System. The lowest price was: $300.29.
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)).