Luminous function: LED lights ( you can see the time at night)</br>12H /24H format,Two time (you can set the time in two different time zones)</br>3 Group alarm (you can set three group alarm) countdown function (movement / examination necessary)</br>Multiple sets stopwatch (12 groups stopwatch) waterproof: 10ATM water resistant (for swimming / Snorkeling)</br>Long battery life(2-3 year)</br></br>Product Description</br></br>Specifications <br> Gender: Boys girls childrens or students <br> Style: Sport or casual <br> Movement: Electronic and Quartz <br> Water-proof: 10ATM <br> Case material: ABS <br> Band Material: Silicone <br> Clasp type: buckle <br> Case diameter: 34mm <br> Thickness of case: 14mm <br> Band width: 16mm <br> Color: as picture <br> Thickness of band: 2mm <br> Suitable for wrist(perimeter): 140 to 195mm <br> For age:5-15 years old (subject to actual wrist circumference) <br> <br> Package include: <br> 1 x watch <br> 1 x English Instrution Manual <br></br><br/>http://www.amazon.com/gp/product/B00YTXA3RY