Backlight function: The bedroom clock has a backlight for easy time reading at night or in dark environments; press the button to activate. Practical and convenient for midnight time checks. Specifications: Measures 6.5 inches high, 4.5 inches wide, 2.5 inches deep. Metal frame, built-in backlight. Powered by 1 AA battery (not included); non-alkaline batteries recommended for longer life. Bell Alert: High quality smooth sweep quartz movement with super loud siren sound, ideal for heavy sleepers and those who struggle to wake up. No snooze button. Suitable for adults, teens, children and seniors. Easy to use: Simple analog setup - turn the knob to set clock and alarm time, with on/off switch for alarm settings. Battery-powered, no power cord needed, portable for travel; kids can use independently. High-quality: Iron case, solid glass, luminous numbers for daily use. Vintage double bell design, classic and timeless style. Perfect as a back-to-school gift for teens/kids to manage their time. Colour: As shown. Material: Metal+ABS+Glass. Size: Height approx. 16.5cm, clock face diameter 10.5cm. Package Contents: 1 x Alarm Clock (only included items, others not included). Note: Light reflection and different displays may cause slight color differences from the real item. Measurement error allowed: +/-1-3cm.