8ohm 1 watt speaker included. A really fascinating project. In the output of the circuit you can connect any audio power amplifier. 12 VDC Max. Cellular phone sounds imitates real phone tones, engaged and ringing sounds, two door chimes.
Tunes cycle through the sixteen tunes with each keypress.
A LED fluctuates according to the sound level. Designed for high quality melody products. All with 2 flashing LEDs. Adjust the component values in the two RC networks to get exactly the tones you want. 3V low stand-by current.