$8.99 – Remote Distance: 30M, Receiver sensitivity: 105dB, Operating Voltage: DC 12V, Receiving frequency: 443.92MHz, Max load current: 20A, Frequency: 315mhz, Operating Current: 13 mAh.
The coupon price for 2 Transmitters with 12V 4CH Channel Relay RF is $8.99 (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
Latest price update (UTC time):
Banggood ($8.99)
Banggood warehouse is located in China. I have no active coupons for you right now. Isn’t it too expensive? I have never seen better price than the current one in CouponsFromChina database, so it’s the best!
Link: Banggood product page
Price: $8.99
This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG1d6233, BG00c906, BG589b2e, BGET10
(these coupons are old, so probably won’t work)
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 2 Transmitters with 12V 4CH Channel Relay RF? There we go. The lowest price was: $8.99.
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)).