Features: Powered by a built-in rechargeable lithium battery, it lasts up to 48 hours on a full charge. Equipped with foot control and wireless BT connection. Suitable for tablets, mobile phones, or computers, it can control page turning, spectrum turning, multimedia software control, and replace certain function keys on the keyboard. Features 7 operating modes, each with 7 corresponding indicator lights. Supports multiple intelligent spectrum turning programs: photos/forScore/OnSong/ PDF/NextPak/Image Library/GoodNotes/Mobile Sheets/SongBook/UnrealBook/Paperless Music/plaScore, etc. Supports continuous transmission function for smooth, one-foot operation. Utilizes a foot control design and wireless BT connection for ease and convenience. Specifications: Power supply: 5V10% power adapter charging Working voltage: Less than 6V Output interface: 2 momentary step pin switches This product has 7 modes to choose from; select a mode according to your needs. The 7 modes correspond one-to-one with the seven lights on the left side of the front panel. Please see the following introduction. 1. Can replace the left and right keys on the computer keyboard, or for other devices to turn the page 2. Can replace the up and down keys on the computer keyboard, or for other devices to turn the page. 3. Can replace Page Up and Page Down keys on the computer keyboard, or be used for other devices. 4. It can function as the space bar and Enter key. 5. It can be used in multimedia software to switch between the previous song and the next song. 6. It can be used to swipe left and right on your Android phone 7. It can be used to swipe up and down on your Android phone. Size: 110 x55.57 x 28mm Material: ABS Color: black Package Contents: 1 x Square turner pro 1 x USB cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.