Detect range: , Detection sensitivity: ≤0.03mw (main frequency), 1.2GHz wireless camera: 10 ㎡ (standard 10mWcamera), Indicating: 9 level LED Luminous instructions/modulation sound instructions, 2.4GHz wireless camera: 15㎡ (standard 10mW camera), Working time: 10-15 hours, Weight: 160g, Working current: 60mA, Moblie: 2G /3G /4G: 10 ㎡, Volume: 102×52.5×21.5mm, Frequency Range: 1MHz-8000MHz, Power: built-in 3.7 V800mAH lithium polymer battery, Material: aluminum alloy, Detecting the dynamic range: <73Db. Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
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 code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. There’s only 1 record in my database, so I have no idea if the price is OK. I found coupon for you. Check this out.
Link: Banggood product page
1. ($37.59): BG589b2e
apply it 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): DealBGimpact, Cuponation9, 9OFFSUMMER, BG8ReviTrage, BGcoupon8off, BGGutscheine, BG00c906, BG8OFFCOUPON, TTBLACK5
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
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 $29.99).
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)).