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स्पीकर के लिए एक सरल उलटी गिनती घड़ी, रंग अधिसूचना और कंपन के साथ।
Speaker Timer is a simple timer for speaker, that can change a color of screen and execute a vibration for indicate an expire shortly (at determinate time) and for indicate the end of session.
The only presence of hour and minutes, and the black background color, is for reduce the power consumption during the countdown.