RECHARGEABLE KEYBOARD AND MOUSE COMBO- No need to change batteries any more!Both mouse and keyboard are built in 500mAh lithium rechargeable batteries; one full charge in 1.5 hours, the wireless mouse works for more than 90 days while the wireless keyboard power lasts over 180 days. And both keyboard and mouse will automatcally enter power saving mode if inactivity in 20s. Just click the mouse or hit any key of the wireless keyboard to wake them up. COMFORTABLE AND LESS NOISE-JOYACCESS wireless keyboard has all keys in scissor-cross mechanism;which maks it ulra-thin (keystroke travel 2mm),light resposive and less noise.The wireless mouse is also built-in newest noise-free switches for quiet click.Both keyboard and mouse give a world of silence; great for conference, board presentation, library, coffee shop, night work, travel, etc. HIGH PRECITION-Wireless Mouse DPI 2400 in 5 levels-You can easily change the cursor sensitivity of this cordless mouse depending on your activities;u