Product Material: plastic shellColor: BlackQuantity: 1 piecePackage content: 1 x stopwatch1. Muting the working status This referee stopwatch works mute during normal usage time, give you quiet environment when using2. Lagre LCD Display and Accurate Function Can display minutes, seconds. Measure time to within a hundredth of a second3. Give a button rechargeable battery Powered by 1 x AG13 battery (included, don't need to buy). The battery is replaceable4. Stainless steel referee whistle with lanyard High-quality stainless steel material whistle is characterized by a clear sound. And with removable yellow lanyard, you can keep your hands off whatever race, workout, and other sports5. Multifunctional timer stopwatch Lightweight, meet the requirement of most situations. Serving as a stopwatch, clock, chronograph and alarm. Apply to many sports. Soccer, basketball, running, fitness, swimming, baseball, wrestling, taekwondo, and so on