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. You probably want to know what is the 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 and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($16.14): BGherra
2. ($17.99): 13f142
put item in your cart and apply coupon code there 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
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for UNI-T UT353 Sound Level Meter? There we go. 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)).