TC-Helicon GO VOCAL, Microphone Preamplifier, Suitable for mobile iOS and Android devices; PC and Mac, XLR microphone input, Switchable 48 V phantom power (switchable), On / off switch, Headphone output (3.5 mm) with volume control, Powered by 9V battery (not included), Dimensions: 92 x 45 x 38 mm, Weight: 100 g