 Decibel• Extra loud ring signal is guaranteed whatever the voltage of the ring signal (Decibel will deliver its full ringing power between 30 and 100 volts AC ringing current 25/50 Hz)
• Loudness : up to 101 dB (measured at 1 meter). |  Performance Ringer• Loudness : up to 92 dB (measured at 1 meter with 80 Volts 50 Hz current)
• 4 different tones and 4 different rythms allow selection of the best ringing signal among various kind of noises. |