$6.55 – Waveforms: Square / Sine & Triangle, Impedance: 600 Ohm + 10%, Frequency: 1Hz – 1MHz, Voltage supply: 9-12V DC Input.
I have just checked coupons. The lowest price I could get is $6.55 for Geekcreit XR2206 Signal Generator DIY Kit (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 coupon and price update (UTC):
Banggood ($6.55)
Banggood warehouse is located in China. You probably want to know if this is a good price. This price is higher than average price ($6.22) for this item. Only one coupon available!
Link: Banggood product page
Price without coupon: $6.89
1. ($6.55): BGCOMDIY5
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): Terence, Tabby20, 2203ActiesNL, BG1efeb0, MVC8SPRING, pROMo8cuPoN, BG00c906, BGJUNEGSG9, Cuponation9, BG589b2e
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Geekcreit XR2206 Signal Generator DIY Kit [EU] ($-3)
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
Here is price history (for all/most countries) for Geekcreit XR2206 Signal Generator DIY Kit. The lowest price was: $4.59.
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)).