Time projection and readability - Project the current time onto the wall in red, with the projection staying visible for 5-10 seconds for quick reference without turning to look at the clock. Voice time readout - A built in voice timing function lets you hear the time read aloud by pressing a switch, so you can know the time without looking. Alarm clock features - Set a wake up or reminder alarm with a 24 hour display. The alarm can be set for times between 7:00 and 21:00 to suit daily routines and activities. Indoor temperature display - Displays indoor temperature in real time, helping you monitor room conditions at a glance. Power options and durability - Two power supply modes: battery operation or charging via DC 5V USB cable. Designed for long term use and flexible placement. Compact size and versatility - Small and compact in size, this projection alarm clock fits on desks, nightstands, or shelves in the home or office. Use scenarios - Bedroom or nightstand: View time at a glance with wall projection at night, use the alarm to wake up, and check the room temperature before sleeping. - Office or study desk: Check time quickly via projection, use the voice readout to confirm time without looking, and monitor ambient temperature for comfort during work or study. - Living room or kids room: Place on a shelf or side table for a convenient time reference, alarm reminders for activities, and temperature awareness in shared spaces.