- Viking Electronics battery booster and current looper to line powered devices- Run line powered devices such as handsfree phones, touch tone hot-line dialers, digital announcers, etc.- Increase maximum loop length on analog PABX/KSU stations- Use with wireless doorbox devices - Boost talk battery voltage up to 40VDC- Boost talk battery loop current up to 26mA- Power LED also displays activity- Passes original ringing through to the device- Passes caller ID data- Passes hook switch flash- Passes CPC signal