U1 Window


Under the label „Jonsbo - powered by Cooltek“ we present high quality cases for demanding users.

The "U1" is the most compact model in the attractive U series for home PC systems. The main feature of this case series is the timeless design line with the elegantly rounded corners and a very appealing exterior. This version offers a transparent window in the left side panel; a special optical highlight for all hardware enthusiasts who enjoy the view at the inner workings of their case.

This refined and at the same time unobtrusive design of the case ensures that it can blend in with any interior style. The blue illuminated power button is recessed into the sleek front; the I/O panel with 2x USB 3.0 and the HD audio connectors can be found on the right side of the case (as seen from the front). The "U1" is made of 1.8 mm thick anodized aluminium and is available in black and silver.

The high-quality and well-manufactures ITX case supports motherboards up to a maximum size of 170 x 170 mm. The installation of the motherboard is very simple - after you remove the left side panel it can be installed with little effort on the right side panel. SFX power supplies can be installed in the "U1".

In order to guarantee a particularly smooth-running system, the hard disk drives are anti-vibration mounted at the bottom of the “U1". You can either install 2 x 2.5 inch or 1 x 3.5 inch HDD / SSD.

Due to the compact size the "U1" offers no assembly areas for optical drives or expansion cards and thus follows the original ITX - idea. It is thus aimed at users who are looking for a very stylish PC for typical living room applications. Thanks to the intelligent design of the case, you can install CPU-coolers with a maximum height of up to 135 mm. Therefore even compact tower cooler can be installed in the "U1".

The ventilation system of "U1" is designed for lowest possible noise levels. Users can install up to two 80 mm fans at the rear side of the case to ensure rapid evacuation of the heat from inside the case. Air intakes in the front of the left side panel allow a continuously heat exchange. The use of aluminium contributes to the improved heat dissipation.

The stylish case rests on vibration-decoupled case feet in the appealing looks of high-quality Hifi components.

Two USB 3.0 “Super Speed” connectors are available externally. Thus, external hard disk or USB drives can be connected quickly and easily.

Depicted hardware is not included.


Available downloads:

Download Manual U1


Case Type HTPC / ITX
Form Factor Motherboard Mini-ITX
Form Factor PSU SFX
3.5 inch drive bay internal 1 x
2,5" inch drive bay internal 2 x
Case fans (rear) 2 x 80 mm (optional)
Height x Width x Depth 267 x 162 x 197 mm
Weight 1.4 kg
Material 1,8 mm aluminium
Maximum height of CPU coolers 135 mm
Code 4250140364159
Manufacturer number JB U1 K-W

Color selection