Standby time: 30 days. Uninterrupted working time: 30 hours. * Bluetooth V2.0/3.0 interface Standard. Operating Distance:10meters * Package Included: 1 x Bluetooth Keyboard Case, 1 x USB Cable, 1 x User Manual. * Key Life: 5 million strokes. 6~10 DAYS DELIVERY to USA! * TOP® is our registered trademark and all rights are reserved. We have never authorized any other seller to sell our products and will pursue legal action to sellers who sell our items in Amazon to bring excellent purchase experience and service to customer!