VT610TC is a wired, discreet earphone for broadcast and security use. Sound is fed directly into the ear canal via a spiralised sound tube and a mono 3.5 mm jack. It offers 125 Ω or 32 Ω impedance, a 100 Hz–4 kHz frequency range, and 120 dB sensitivity at 1 kHz. The device weighs 20 g and uses a 1.5 m cable, delivered in the VT610 BOX with EAR/BEIGE, and supports optional FLEXIBLE EAR INSERTs (left or right ear, sizes S–XL) or EAR ACCORDION.