Battery: 3x AAA 1.5V batteries(Not included), Sound Leve Range: 30-130dB 0.1dB ±1.5dB, Auto Power off: Automatically power off after 5mins without operation, Overload indication: Shows “UN” and “OL”, Data Hold/Backlight: Shows “HOLD” and turns backlight on or off, Size: 150x 52x 27mm, Weight: 116g, Sampling Time: Fast/Slow 125ms/1000ms, MAX/MIN Measurement: Shows “MAX/MIN”, Rate response: 31.5Hz-8KHz, Low battery indication: 3.0-3.5V Shows low battery prompt when power is 3.0-3.5V.
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. ($16.14): BGherra
2. ($17.99): 13f142
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): d67c25, FinUNI-T, 502C6B, 15NATURE, 15ANENG, BGNEMPRO, AFfbG10, BGVDay10%off, BGAFF10OFF, BGTT10, bGhOnEy10
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for UNI-T UT353 Sound Level Meter. The lowest price was: $12.49.
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)).