Alctron Ha-7 Headphone Amplifier.

Sold by Melotunes Musical · Accra Metropolitan

It's a compact and portable device designed to amplify headphone audio for personal monitoring applications. It features a volume adjustable knob, can be powered by a built-in battery (in some models like HA-8) or a standard power supply, and includes a MONO/STEREO switch. The HA-7 is designed for use in studios, live performances, and for general headphone distribution, offering high-fidelity sound.