Features: Sensitive Touch & Automatic Calculation: The hidden sensor copper sheet are a provides sensitive hands touch control. Innovatively added automatic calculation grade design so that your progress can be seen at a glance. Anti-slip design: 8 anti-slip pads are properly distributed on the back not easy to slip off. Big Screen Enjoyment: Equipped with 2.5mm external port can be linked to major brand displays and Mobile DCTimer application (the package include the connecting wire). You can share good grades with friends anytime anywhere. Use Occasions: A great timer for kids or adult game timing tools. Very suitable as competition timer dice timer time management tool desktop timer timer training. Customer Service: With customer satisfaction as our first priority we offer a satisfaction service for all of our merchandise. Specification: Size: 27*5cm Material: Plastic Color: Black Notes: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. includes: 1*Speed Timer 2*Battery