Product Compatibility: Compatible with - BACtrack C6, Go, C8, Mobile and Keychain Breathalyzers , do not worry about the size. Exquisite Workmanship: This product belongs to the wear-resistant and drop-resistant hard case, the zipper is of high quality, and the case is divided into two parts: half mesh pocket and full mesh pocket with zipper. Protective: The protective case is made of PU material, waterproof and durable, you can rest assured that you can put your alcohol tester, charging cable, mouthpiece and extra batteries in it. With this case, you no longer need to worry about the alcohol tester and accessories nowhere to store, no longer worry about the alcohol tester is damaged, our case will give your alcohol tester effective protection! Portability: The case is portable with a hand strap and included hiking clasp, so you can choose to carry it by hand, hang it on your backpack, or carry it in your handbag. The size of this product: 3.94*3.03*1.5in, small and lightweight, perfect for storing your breathalyzer! Note: Only include a case and a hiking clasp, breathalyzer is not included, please do not misunderstand when purchasing. This product is suitable for BACtrack C6, Go, C8, Mobile and Keychain Breathalyzers, waterproof, wear-resistant and durable, can play a good protective role. Small size and light weight, equipped with hand rope and mountaineering buckle, easy to carry, very convenient. Please feel free to use it!