Features: Portable and Stable: Made of non-toxic ABS and PC materials, compact size and lightweight; with 4 anti-slip pads on the bottom of the page turner, stable to use. Free Your Hands: The wireless page turner pedal is designed to remotely control page turning of sheet music in the music APP with your foot. It can free your hands and make your music playing much smoother. Easy to Use: Just lightly step on the pedal, the page will be turned silently. Replaceable Battery: Powered by 2 * AAA battery (NOT included), long service time and easy replacement. Wide Compatibility: With wireless BT connection and stable signal transmission, the page turner pedal is suitable for smart phones and tablets compatible with iOS or Android systems. (The iOS system does not support turning sheet music in the music app.) Specifications: Material: ABS + PC Power Supply: 2 * AAA battery (NOT included) Item Size: 160 * 68 * 25mm / 6.30 * 2.68 * 0.98in Item Weight: 85g / 3.00oz Package Weight: 162g / 5.71oz Package Size: 21.5*11.5*3.5cm / 8.46*4.53*1.38in Package List: 1 * Page Turner 1 * User Manual (English) Note: The page turner is compatible with the iOS system for browsing pictures on your mobile phone, but it cannot turn pages of sheet music in the music APP.