Frequency Response 80-20kHz, Battery Capacity 4000mAh, Impedance 4Ω*2, Charging Time (h) 2-3h, 3.5V, Output Power 5W*2, Bluetooth Version V4.2, Connectivity Bluetooth/ Aux-in, Transmission Distance 10m, SNR 85dB, Play Time (h) up to 20h.
Go down and check coupons out. Remember to check price history if it is available. 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 price update (UTC time):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
1. ($58.90): BGAlerabatKL
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): ip25, 50se1, 502C6B, ZEAsue, TTxBG10, 2019SPEDM, BGss506, bgssaff9, AFfbG10, BG20CES, BGVDay10%off, EARSP11, BGAFF10OFF, BGTT10, bGhOnEy10, 7d18f7, BGSS10%SW, bgshOOp10, BGELIG0920, BG11SHOP, BG4BW25, BGLOAC1, 13f142, BGBuscape01, BG651551, BGBRPL2, BGHOTSHOP15
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for ZEALOT S16 Bluetooth Speaker. The lowest price was: $36.74.
Price records source(s): Gearbest, 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)).