FIVE AT ONCE: The ALTAIR io Charge can charge up to five io 4 wearable detectors and has the same size profile as the io Dock test stand. Detectors are inserted face up, with charging pins to rear. Charging prongs must connect to charging terminals or instrument will not charge. EASY TO UNDERSTAND: Green light indicates not charging which means fully charged or no instrument inserted. Red light indicates the unit or units are charging. Each multi-unit charger requires an individual power source. Unit can be used as a stand-alone device or mechanically attached to a MSA io 4 Calibration Station. ZERO-INTERACTION RETURN: When you place an ALTAIR io 4 Device in the charger, it is marked as returned to the company in the Fleet Management System. ORGANIZE AND CHARGE: The ALTAIR io 4 Multi-Device Charger's wall-mountable five-bay design provides an organized home for every device in your fleet. TESTING SYSTEM COMPATIBILE: Charging station housing designed to connect to other testing system components or charging stations, charging stations powered separately from other testing system parts.