Projection Function: When using the 5v power adaapter(not included), projection will always light on. When operated by AAA batteries (not included), projection will light up for a few seconds. - The all-in-one feature makes it a must-have tool for your home. This projection alarm clock with temperature(°F/°C), humidity, showing time(12H / 24H), date, week. It provides 4 backlight brightness mode, dual alarm design, snooze function, 180° forward and reverse projection, power by AAA batteries( not included), or 5v power adaapter(not included). With usb output port, which can charge for your phone and other electronic equipment. Note:Four backlight brightness modes and permanent time projection can only be achieved with DC power. - Features:With LCD display, showing time(12H / 24H), date, week, temperature(°F/°C) and humidity. - In DC power, 4 backlight brightness mode, high light - medium light - low light - off, high light mode for 8 seconds in battery power situation. - Dual alarm design, gradually increase, 5 minutes snooze function.160° rotating angle, 180° forward and reverse projection, cater to your different needs. - The suggested distance of projection is 1-3m(3.3-9.8ft). Two ways of power supply, power by AAA batteries( not included), or 5v power adaapter(not included). With USB output port, which can charge for your phone and other electronic equipment. - Specifications: Color: Black - Display Type: LCDTime Format: 12 / 24HRTemperature: -9°C - +50°C / 15 - 122? Battery: 2pcs AAA batteries(not include)Size: 13.5x2.3x8cm/5.3x0.9x3.1in - USB Cable Length: About 1.5m/4.9ft Package Include:1 x Projection Alarm Clock 1 x USB Cable1 x User Manual