, Relay light: Available, Weight: 500g, Upgrading: USB online upgrade, Model: ET16S, Language: Chinese / English, Voice: Support voice broadcast, Hall sensor rocker assembly, Band: 2.4GHz (Bidirectional), , 180/270°Servo: Available, Display: 3.5inch touch / 480*320 / color display, External RF modules: Support, Resolution: Full Channel 4096, Wireless signal copy: model data, Current: 260-400mA, Application: Helicopter / Airplane / Multi-rotors /Vehicle / Ship., Channel: 16CH, Programming: 5 Groups Mixed Control, Voltage: 3.5V-13V(1S-3SLithium battery), Storage: 30 models.
Check coupons or create price alert down below. 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 code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($169.08): BGGAL8
2. ($169.08): BGRCParts8
3. ($169.08): tRaDetRaCKeR
4. ($169.08): 8wEbgaInS5
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): 7bcdf9, Parts8, BGRCRR9, BGCuponation10, BGDAVIS, BGradio9, BG70e5fc, BG1efeb0, MVC8SPRING, 8BGwbg2204
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for WFLY ET16S RC Transmitter R9M with RF201S. The lowest price was: $137.99.
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)).