Features: Built-in 210mAh battery with solar receiving board so it can be used without battery. Supports 12-digit large screen display which makes it more practical for you to use. With a for smart shape and modern design, practical to use. Ultra thin, portable and useful. compact, light weight and easy to carry. The calculator is made of eco-friendly plastic and electronic components, the bottom of the calculator has a non-slip gasket, which is not easy to slip during operation. Specifications: Size: Approx 10.3X18.5cm/4.05X7.28in Color: Green/Red Weight:185g/0.4lb Material: ABS Applicable Battery Type: Solar / Built-in 210mAh Battery Operation Style: Capacitive Type: 2.4Ghz Wireless Application: Number|Desktop|Laptop|TabletKeyboard Standard: Mini Keyboard Language: English Note: Transition: 1cm=10mm=0.39inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. for Wish you a pleasant shopping experience! Package includes: 1 x Calculator