This is not my first digital microscope by any means. but I have to say that it's the best that I've had yet! Without comparing this model to the interim units, I'll compare it to the first one I ever bought. That one was a hand-held USB-connected model. It didn't have a built-in screen like the Opqpq, but rather connected to a PC or a smartphone/table with OTG capability. At the time it was amazing, but by today's standards it had a pretty low resolution and always required that wired tethering to another device in order to be usable.This Opqpq Digital Microscope is light-years ahead of that older model. FIrst of all, the resolution of it is amazing! The old one topped out at 640X480 DPI, but this one allows capturing video at 1920X1080, or still shots at 4023X3024! Secondly, it can be used completely wireless and standalone, because it's battery powered and has its own screen built-in. I'm not sure what the resolution of the display screen is, but it's super-sharp and large enough to allow comfortable viewing of the scope's images. The internal battery is rechargeable, and the microscope can even be used while charging. It uses a single atandard 18650 Lithium-Ion cell which is easily replaced, so even if you are working in an area without convenient access to an AC outlet for charging the battery or plugging in the scope; if you deplete the charge you can simply swap the cell out for another one and keep right on working.Besides the LED lights built into the scope itself, the base also has two additional LED light sources mounted on goosenecks for positioning as needed to get just the right illumination you need. The base gets power from the scope head via a coiled cord that connects the two units. The base lights and the scope lights can be set independently to a brightness level appropriate for what you are viewing, which is a nice feature. There is also a wireless remote that's connected to the same cable that carries power from the head to the base. The remote allows access to the functions that are also accessible on the scope head, so technically you don't NEED the remote, but it's certainly handy for taking snapshots of what you're viewing; to avoid introducing vibration view in the image that might happen by snapping a picture from the button on the head.Some reviewers of this unit have commented that you can't zoom out enough to capture an image of an entire coin (since these types of devices seem to be very popular with coin collectors), and that is certainly true, although I think it's a common malady of most of the comparable scopes out there. But you can capture a close-up image of an entire coin with most cell phone cameras nowadays, so I don't think this is a huge limitation. But when you need to get a close-up of some features of a coin, this scope is great for that: giving you a bright, clear, high-resolution image on a large screen of something that would otherwise be difficult or impossible to see with the naked eye.I think this scope is an excellent and useful tool, and something that can be enjoyed by people of all ages and interests to explore the realm of the tiny for fun, education, and profit.