Senstroke 4 Sensors Standard Pack, Drum Sensors Set, Complete package consisting of 4 sensors, Allows you to play on any interface via Bluetooth connection after setting up, 12 Hours of battery life, 2 Hours charging time, Compatibility: IOS 10 and above, Android: supported devices at www.senstroke.com, Includes band, 2 micro USB cables for connecting and charging the sensors and 2 footbands