Review on Lad Weather Altimeter Barometer Compass Watch with Heart Rate Monitor & Thermometer - USB Rechargeable for Climbing and Trekking by Mark Hart

The watch corresponds to the seller's description. I've been using it for a couple of weeks and in that time I've confirmed that the barometer is accurate. It's hard to tell about the temperature readings, but they're certainly within the normal range (take off your watch to get an accurate reading of the ambient temperature). Distance traveled in travel mode is accurate (I used my car and the GPS app to check it). The clock keeps time well and has alarms if you need them. The compass works fine, but only after it has been calibrated. Forget calibration. You will surely get lost. In general, I am satisfied with the work of the watch. One of the reasons I bought this particular watch was the ability to charge the battery with the included USB charging cable. All reviews of watches that rely on battery replacement have found problems with this way of powering the watch. Most watch sellers want you to use their service centers to change the battery; Otherwise you will not be covered by a warranty. The reason I gave the watch four stars instead of five is twofold. First of all, I received the watch without a charging cable. It's a custom USB cable, so you'll need to use the one that said it came with the watch. It took the seller two weeks to get the cable to me after I requested it (the cable came from Japan). Second, the instructions are in very small print. I have trouble reading. The seller quickly provided a link to the digital manual I requested. However, not all functions of the watch are described in the digital manual, so I still stick to the small print instructions.