Krown Amplified Telephone Ringer TA005 classroom and carbon monoxide

and carbon monoxide

Amplifies incoming voices up to 170 times (45+dB)

If you subscribe to digital subscriber line (DSL) high-speed internet service through your telephone line

USB smartphone charge port

Krown Amplified Telephone Ringer TA005 classroom and carbon monoxideThe Krown TA005 features a bright built in white flasher with a 120 dB audible alarm, so you'll never miss another important landline phone call. The device connects between the telephone and home phone line. Features: Loud ringer up to 120dB Audible ringer operated by telephone line (included) Built in dual phone jacks White strobe light with on off switch operated by 6V 1000MAAC adapter (included) Battery backup (three AA batteries not included) 1