The Shure SBC10-100 USB Battery Dock Charger can be powered from A/C power sources and USB ports to charge one Shure SB900 or SB900A Lithium-Ion Rechargeable Battery.
Battery Charger:
Input Voltage: 4.75-5.25 V DC
Input Current (AC Adapter): 1000 mA
Input Current (USB Power): 500 mA
Output Voltage and Current: 3.0 to 4.2 V DC @ 1.0 A
Housing Material: ABS Plastic
Operating Temperature: 32 to 104 °F | 0 to 40 °C
Dimensions (H x W x L): 1.05 x 1.87 x 4.45 in | 26.5 x 47 x 113 mm