The ZHA-4 splits a single stereo headphone output into four independently powered headphone jacks, each with its own volume knob and mute button. That means up to four people can monitor the same audio source at their own preferred listening levels, which is essential for podcasts, band recordings, and any multi-person session.

It runs 3.5 to 4.5 hours on two AA batteries or powers via USB-C from a portable battery pack, keeping it fully portable. The individual mute buttons let you instantly silence any output without affecting the others. Compact and straightforward, the ZHA-4 solves a common problem in mobile recording setups where one headphone output just isn't enough.