The keyboard can be connected with leather cover not included by magnetic adsorption, and change into the working mode of laptop Bluetooth 3.0 wireless connection, fast response without delay, more power saving Built-in 420mAh battery, can be recharged via attached cable Simple design, thin and portable, easy to carry Specifications Dimension 281 x 185 x 6.5 mm Weight 280plusmn5g Bluetooth solution BT3.0 Valid distance gt10 meter Working voltage 3.7V Standby time 180 dadysnbsp Charging time 2.5 hoursnbsp Battery capacity 420mAhnbsp Battery lifespan 3 yearsnbsp Working temperature -10 to 55nbsp Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!