Sennheiser Electronic Corp. now offers a new portable battery pack with a auto-shutoff feature. The BP-04 powers the HMEC350 series and HMEC450 NoiseGard line of headsets.

The battery pack provides 15 hours of operation with four AA batteries. It includes an exterior on/off switch, two LED indicator lights - the yellow one indicates power is low with only 30 minutes remaining. the unit The unit also has an interior switch that allows users to deactivate the auto-shutoff feature.

The BP-04 is included with purchase of HMEC 350 or HMEC 450 NoiseGard headset. It can be purchased separately and is sold with a two-year warranty.