Beautiful. I'm not sure what everyone is talking about Phillips head screws. Mine came with instructions on how to peel off the rubber insulator, lift the battery cover, insert the batteries (4 AAA batteries included, 2 required). It lasted about 2 minutes because I took a sip of beer. Screwed onto the male hose fitting (came with the male and female brass fitting installed) ended up comparing to my other gauges. Vented within 1/2 psi of the other 2. Cool thing, just needed this tool to get to target pressure. The clip-on closure needs a little more force to snap and prevent leakage, but not too much. The instructions say to "screw/thread the cartridge onto the valve stem until fully seated". I just pressed harder and then clicked. Gauge and handle covered with rubber for cushioning. Certified Accuracy: 0-58psi is +/- 1.2psi. 59 - 174psi is +/- 2psi. One click turns on the sensor, the second click turns on the backlight, which stays on for about 5 seconds. The third click does nothing (I was hoping it would turn itself off). Turns off after about a minute and a half of inactivity. With detailed instructions and 1 year guarantee. The READ FIRST and IMPORTANT NOTE cards are made of high quality paper and are color coded to indicate a quality product.