CompuTTY Amplified Ringer and StrobeAmplified Ringer andStrobe- Krown amplified ringer with strobe light- Loud ringer up to 120dB- Ringer operated by line power- Ringer hi/mid/low switch- Powerful strobe light-Tone control hi/low switch- 3 AA batteries required for backup, notincluded- 1 Year manufacturer"s warranty- Box dimensions: 9.5"L x 7"W x 4"D- WhiteKRNKRA005