Remote ≤10, APP Control BlitzWolf/Tuya/Smart Life, Weight 340g, Password Protection Yes, Input Power DC5V/1A, RFID ≤10, Network 2G GSM+Wi-Fi, Color Black, GSM Bands 850/900/1800/1900MHz, Sub-device Connection 433Mhz EV1527, Model BW-IS6 Host, Voice Recording Time ≤20s, Lithium Battery 3.7V/500mAh, Working Temperature -10~50℃, Dimensions 174*109*16mm, Host Security Mode Disarm/Away Arm/Home Arm/Panic, Sub-device Zone Mode Normal/24 Hours/Delay/Home/24 Hours Silent, Anti-tamper Alarm Yes, Detector ≤100 (rename up to 40 detectors), Wi-Fi Standard 2.4GHz IEEE 802.11/b/g/n, Effective Distance 80~100M, Alarm Push ≤5 Phone Calls/SMS & APP Notice.
Just check coupons out (with price alert and history). What is 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. There is no active coupon in my database right now (for Banggood).
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGSAMH, bGhOnEy10, BGSM15, BGBWUU1, BGSMOFF, bgshOOp10, BGSAMRTH, BGHU973, BgcLuBofErtA10, BG15SH12, BGSTHO15, BG3BWIS6CN, BGHONEY2110, BG41b785, BGSHOM15, 13f142, BGSHE15, BGf146ae, BGND044, 6GSGIT, BG4a7a54, BGB5029, BGb81d9e, BG7f595c, BG5bfdb4, BG511c3d, BG5013e7
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for BlitzWolf BW-IS6 Smart Security Host. The lowest price was: $16.99.
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)).