Brand TOA
Model EC-100M
Power Source 3 V DC (R14P × 2)
Chime Tones 4-tone chime (up/down)
Microphone Unidirectional dynamic type
Microphone Frequency Response 200 Hz - 10 kHz
Output Chime signal: -45 dB*, 600 Ω, unbalanced
(chime volume control set to maximum position)
Microphone: -53 dB, 600 Ω, unbalanced (1 kHz, 0 dB = 1 V/Pa)