Stream music from your smartphone, tablet, or any Bluetooth-enabled device with the Carson Bluetooth® Speaker. Integrated buttons allow you to adjust the volume, skip music tracks, or take a call mid-playlist with the built-in microphone. One-touch bass/treble button for an enhanced listening experience. Supports audio playback from a micro SD card or a 3.5MM auxiliary cable. Charging time: approximately 3 hours. Built-in lithium battery can be charged with the included USB-C cable.