All the photos can be found in the Google Photo link:
https://photos.app.goo.gl/7upUftpOWmGNb1rB2
I bought a quantum sensor on the Amazon.com last week. After waiting 2 weeks, I finally got this equipment. It cost me near $400. I do not this good or not, and there is no sufficient information on the net.
From the Amazon comment, seems not good, also on the Youtube, there are 2 videos.
Now I unbox this Quantum Sensor.
It describes on the website:
Sun System PAR Meter comes with an integrated sensor to measure photosynthetic active radiation (PAR). Use inside with Sun System grow lights or outside with natural sunlight. Simple and easy to use. Compact size with integrated sensor. 1 year warranty. Sun System PAR Meter with remote sensor measures photosynthetically active radiation (PAR). Use inside with Sun System grow lights or outside with natural sunlight. Simple and easy to use. Compact size with remote sensor. 1 year warranty.
Here is info from Amazon. Shipping address on the package.
Open the package box, there is a really small box inside. Waiting for 2 weeks, it comess in front of me.
It reads Sun System PAR Meter with remote sensor.
Order info, with tax near $100. Felling not good!!!
Here is instruction Manual.
The thing in a polybag. 
There is also a small battery inside, made In Swiss. The Remote sensor with green cover. The Remote sensor is made by Apogee. You can find that one on the Apogee website, its price is $155. It is model SQ-100.
Battery package information. 
Battery package information. 
I can not find how to install the battery into the equipment, I sent message to Sun Supply, but no reply. How they can do this!!! Bad experience. After removing the back cover, I do not how to insert the battery, due to we have to know the “+-” inside.
There are some letters on the PCB, it shows BATT.
Here is the sensor detail view.
The size of the equipment. It is 115 x 60 x 15 mm.
Length
Width
Height
Sensor Size, it is OD 23 x 28 mm.
Height
After reading the manual, I got confused about this product, it said it can test PPF? But for this item, it can test PPFD, not PPF. As I watch some videos on the Youtube. Understanding the spectrum response.
From You tube.
Here I am trying.
The whole video from Youtube.