Check the listing for details. Melody Card Telephone Ring COB Module. Condition: New. Listed at 1.05 USD. Complete Card Melody Unit- 'Telephone Ring' Melody IC COB, battery and piezo all ready to play. As found in Christmas cards and books which play when you open the page. Self-adhesive backing. Duration 8.8 seconds. Melody repeats continuously while power is connected. Cmos LSI. Cmos LSI chip in small chip-on-board PCB. There could not be fewer external components! A 1.5V battery and direct drive to piezo speaker included. Ready to play! The oscillator is build-in. Melody already programmed in ROM. You can modify the switch or add your own. Also you can take the output to an amplifier. The ideal building block for door bells, alarms etc. Tune in this unit: Telephone Ringing sound. Modules with different songs can be special ordered. Minimum order quantity is 1000 units. click here for list. (T9) You want a unique sound, or a song not on the above list? We can help but the minimum order qty for a custom sound is 100,000 units + a tooling charge. The length of songs is 96 notes maximum, in a simple melody tone. Other conditions also apply. Contact us for full details.