It is powered by the phone line, no additional power supply needed. The new, improved dome shape spreads light to better signal and an incoming call. Works with telephone PBX system and video phone equipment.
Phone Call Alert Flashing Phone Alert
Phone Call Alert - Flashing Phone Alert This phone call alert monitors a telephone line for incoming calls and flashes the bright strobe light & chimes to alert the hearing impaired and those in noisy areas that the phone is ringing Perfect for those with mild to profound hearing loss or those in very noisy environments. It is also great for situations where you need a silent telephone alert. This telephone ring amplifier alerts you in multiple ways. There is a bright orange flashing light that will certainly get your attention and then there are two settings for the audible alarm. The low setting will alert almost anybody, but the loud alert will absolutely get your attention. The telephone amplifier and flasher call alert requires that it be attached to a phone outlet, but it doesn’t need to be attached to a phone to operate which allows it to be used in different rooms without having to move the phone.