Input Noise 32dB, Frequency Range 300-3500MHz, Max Sound Output 115+/-3dB, Working Time ≤16 Hours, Material Plastic, Hearing-aid(Each One) Built-in 25mAh Rechargeable Batterys, Quantity 1 Pair, Total Harmonic Wave Distortion ≤3%, Sound Gain ≥28dB+/-5d, Current ≤2mA, Charging Time ≤6 Hours, Color Skin Color / Black / White (Optional), Voltage DC1.5V.
Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
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 and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($40.99): BGb87cae
2. ($48.44): BG75597c
3. ($51.86): Cuponation9
paste coupon code in your cart and click Apply 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): BGd7bb7a, tRaDetRaCKeR, BG791718, BGf87df9, BGHECARE1, BG4ee866, BGb7a0c3, 9OFFSUMMER
(probably won’t work, but you can try them out)
Price history and price alert
Do you need price history chart (for all/most countries) for Digital Hearing Aid Rechargeable Amplifier? There we go. The lowest price was: $40.99.
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)).