Welch Allyn Desk Charger for 2 handles This compact, portable unit provides convenient drop-in recharging of desk/well charger instrument handles. • Coloured LEDs indicate power to the unit and that the handles are charging • Advanced circuitry for constant, automatic, safe charging and optimum lamp performance and life • Compact for convenience and mobility • Accepts all 3.5V or 2.5V well-rechargeable handles.