Big Display Clock TCL 410 with automatic time setting, extra loud ring light alert and vibration pad. Ideal for people with visual or hearing difficulties. Mains powered with battery back-up facility. o Large 3 / 7.8 cm digits with red display, 3 dimming levels. o Extra loud alarm over 95dB. Snooze function – sleep timer. Vibration pad to alert heavy sleepers. USB connection for charging cell phones. Ultra bright alarm light effective for use in day light. oAlarm can be triggered by smoke alarm alert within 3 metres. Switch time display 12 or 24 hour clock, battery back-up (not supplied).