Charger with 2 charger bays, for SK/SKM D1, SK/SKM AVX, SL DW, BA 10, BA 30, including power supply NT 12-4C From The Manufacturer: The CHG 2 charger makes battery management really easy. The mobile transmitters, while not in use, are charged in the two charging bays. Thus, the devices are always ready-to-use when needed. The bi-color LED provides the status (charging or fully charged). For seamless installation, the external power supply provides the necessary flexibility. Specifications: Input voltage 12 V Input current max. 1100 mA Charging voltage 5 V Charging current max 2 x 1000 mA Compatible accupacks Sennheiser BA 10, BA 30 Charging time for full charge at 20 °C 100 % = approx. 160 min = green Temperature range: Storage: 0 °C to 45 °C (32 °F to 113 °F) Operation: -20 °C to 70 °C (-4 °F to 158 °F) IP protection class according to IEC/EN 60529 IP2X Dimensions (W x D x H) 175 mm x 135 mm x 93 mm (6.89" x 5.31" x 3.66") Weight (without power supply unit) approx. 375 g (13.23 oz)