- All-in-one product powered by the phone line, no additional power supply needed. The improved dome shape spreads light to better signal an incoming call. Will work with some telephone PBX system and video phone equipment.- Krown phone visual flasher - When the phone rings the light flashes to alert you of an incoming call- Great for noisy areas and for the hearing impaired- Replaces the TEC070- Needs at least 75V to operate properly- Plugs in on the line from phone to wall jack - No battery needed- White- KRNPSF100