$30.35 – CH 1-CH 4: Connects the servos / power supply, other components, Online Update: Yes, BIND: For bind cable, Model Type: Car/Boat, Data Output: PWM/i-BUS/PPM, Channels: 4, Antenna: Built-in Antenna, i-BUS: for channel expansion, Frequency Range: 2.402-2.480GHZ, Transmission Power: <20dBm(EU), Input Power: 3.5V 8.4V, Certification: CE / FCC ID: N4ZFGRS400, RF Standard: AFHDS3, Display: LED Indicato.
$30.35 – that is current price with coupon for Flysky FGr4S V2 RC Receiver (in Banggood). Just check coupons out (with price alert and history). Do you want to know what the best price is?
Latest price update (UTC time):
Banggood ($30.35)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. Price? The average price for this item is $31.59, so I think it’s a good price!
Link: Banggood product page
Price: $30.35
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): Parts8, BGRCParts8, Tabby20, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGRCT10, BGJUNEGSG9, BGRADIORU, BGToys8, BGMatt2022
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
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.
Price history and price alert
Do you need price history chart (for all/most countries) for Flysky FGr4S V2 RC Receiver? There we go. The lowest price was: $27.99.
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)).