When the environment is exposed to direct sunlight or considerable light intensity, it will affect the product effect. Please make sure that you don't mind before purchasing. Package Included: - 1 x Set of Glow Tube Clock Note: - It is assembled. Brightness Setting: - Step 1: Press EFF button once, tubes will display brightness value (0-100), long press + or-button to adjust the brightness; - Step 2: Press the EFF key twice to complete the brightness setting; - Step 3: Press the EFF key three times to scan full-area brightness and enter the state of automatic brightness adaptation. Clock/Alarm Setting: - Press SET button once to enter clock hour value setting state, hour digit flashes, and the rest are displayed normally, press + or - button to set; - Press SET button twice to enter clock minute value setting state, minute digit flashes, and the rest are displayed normally, press + or - button to set; - Press SET button three times to enter alarm hour value setting state, alarm hour digit flashes, and the rest of tubes is off, press + or - button to set; - Press SET button four times to enter alarm minute value setting state, alarm minute digit flashes, the rest of tubes is off, press + or - button to set; - Press SET key five times to complete the clock/alarm setting; - Alarm turns off when it is set to be 00:00.Usually it cost about 35USD-50USD. If you receive defective item, please kindly notify us within 14 days. This item is in the category "Home & Garden\Home Décor\Clocks\Alarm Clocks & Clock Radios". The seller is "thefineshop" and is located in this country: CN. This item can be shipped worldwide.