It weighs 25 grams and is only 25 mm thick. You can put it in your pocket, belt, trousers or wristband and don't worry about it getting lost cause it has a clip in the back of the counter. Advanced chip is more suitable for sports demand than tradition products. 3D sensor technology can provide superior accuracy in reading steps no matter what sport activities you are taking. Powered by one AG13 button cell, the counter will operate for long. If you stop for more than 1 minute, the counter will save the data and turn off autometically for power saving. Quantity over 10K ship by sea, Product size: 2.51" x 2.13" x 0.98"