Relative humidity: less than 95%, The maximum dose equivalent rate: 99.99usv / h, Detectable species: Beta Gamma X-ray, Voice Source: Real particle sound / Alarm sound / Mute, Energy Range: 50kev-1.5mev less than 30%, The use of ambient temperature: -25 ~+45℃, Sensitivity: 80cpm / USV / co-60, Power supply: 2x AA rechargeable batteries(NOT included), Relative intrinsic error: less than plus or minus 10%, Sensor Type: GM tube.
You can create price alert here, copy coupons and view price history. 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 Europe 
. Hmmm… There is no active coupon in Banggood at this moment. I’m not sure about the price, coz I have only 1 record(s) in my database.
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): 5a0d11, BGTT10, bGhOnEy10, 7d18f7, BGSS10%SW, bgshOOp10, BG11SHOP, 13f142, BGCuponation10
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Well, you won’t see price history chart, coz we have only 1 database record for this item (and price was $57.59).
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)).