Features: Completely mechanical countdown timer, our clock timer doesn't require any batteries to operate. Just turn the central knob clockwise to set your time, any occasions that need setting minutes within 60 minutes, ring sound start to alarm user when the dial disappears. Imagine that time left is easy to perceive at affairs processing. Handle things and manage time in brief with a convenient tool, This is the purpose of the time visualize countdown alarm timer we are designed to manage task time and work efficiently. Best tool to help children understand the concept of time. Recommended for parents and teachers, especially special education and early elementary teachers. Considering various use occasions, the countdown timer featured powerful magnets that can easily and firmly stick on metal board, refrigerator, oven, roaster and more metal surfaces. Features powerful magnetic backing panels making it ideal to place on classroom whiteboards and more! Clear alarm sound, designed with a built-in 70db alarm, this visual timer has an audible ringing range of up to 49 feet. The mechanical stopwatch alarm lasts 5 seconds and can be heard in another room. Package includes 2 pack 2.4 inches visual timers, great for classroom, home, and office settings. Makes an excellent classroom timer, study timer, toddler timer, kids timer, kitchen timer, timer clock, time tracker, and more! Specification: Product name: mechanical mini timer Product material: stainless steel + ABS + magnet Product colour: black dial / white dial / white dial & red base (optional) Timing range: 1-60 minutes Product weight: 110g Product size: 6*6*3.5cm Package size: 6.2*6.2*3.7 Packing list: 1 x mechanical mini timer