Press Fit Echo-IV Auto-Learning Wireless Door Bell Press Fit ECHO Wireless Bells are the most premium and high-quality wireless bells available in the Indian market. Operated completely via batteries, ECHO offers you the freedom to carry around the receiver. Also, power failures are not a problem anymore! The DC nature of the product makes it perfect for use as a Distress Alarm for the older folk in need of some sort of help! ECHO offers you the following 32 melodies to choose from in the order as mentioned- 1. Dingdong 2. Westminster 3. Knocking Sound 4. Beethoven Symphony No. 9 5. Fur Elise 6. Ballade for Adeline 7. Souvenirs D’enfance 8. Hungarian Dances 9. JS Bach Minuet 10. Love Story 11. Turkish March 12. Santa Claus is Coming to Town 13. Polish Waltz 14. Melody 1 15. Cuckoo Waltz 16. Cuckoo Sound 17. Farewell 18. Melody 2 19. Melody 3 20. Liuyang River 21. 365 Wishes 22. Happy Birthday 23. The First Noel 24. Merry Christmas 25. Melody 4 26. Melody 5 27. Berceuse 1 28. Oriental Pearl 29. Melody 6 30. Berceuse 2 31. Warriors March 32. Auld Lang Syne