The InLine mobile stereo headphone amplifier is designed to enhance your audio experience on the go. An integrated lithium polymer battery provides up to 8 hours of audio amplification, and this on up to two outputs. Furthermore the bass can be amplified in 2 steps. Headphone amplifier with up to 5x output amplification. For distributing audio signals to up to 2 headphones on the road. Compatible with headsets from Apple and Samsung, with function transfer of the wired remote control. Two-stage bass boost. Built-in battery for up to 8 hours of audio playback on the go. Switch for bass booster.