The SilverStone SST-AP121 is packaged into a cardboard box with a window in its front:
Specifications and a drawing of the fan’s key feature can be found on the back.
The accessories include a PATA connector for 5 or 7V source, screws and silicone pins.
The fan is manufactured in China and costs $15. The warranty period is 2 years.
The SilverStone SST-AP121 is quite an unusual view. Its impeller has seven very broad translucent blades with a small angle of attack.
The blades seem to spread out along the air-focusing grid at the back. The impeller is 110 mm in diameter. The motor is 45 mm. The weight of the fan is 180 grams.
We can also note such details as the thick ends of the blades, the rounded-off edges and the flat interior of the frame. SilverStone engineers seem to have tried to reduce the noise of the fan as much as possible.
We already know how the focusing grid works from our tests of the 140mm SilverStone AP141, but here's a video to illustrate the key principle once again:
The fan has the following specs: 1500 RPM, 35.4 CFM (the air flow is very low compared to the other fans at that speed), 1.71 mm of water and 22.4 dBA. It lacks PWM-based regulation. You can only change its speed by connecting the fan to a 5V or 7V source using the included PATA power adapter.
The informative sticker covers a fluid dynamic bearing with a rated service life of 50,000 hours.
The startup voltage is 5 volts. At its default 12 volts the SilverStone SST-AP121 is supposed to consume about 4 watts of power. The sleeved cable is about half a meter long.