iTOMA Alarm Clock Radio with Bluetooth Speakers,Digital FM Radio,Dual Alarm with Snooze,Cell Phone USB Charging, Auto and Manual Dimmer, Auxiliary Input, Backup Battery (CKS503BT) SUPER MULTIFUNCTIONAL---USB port to charge any mobile device. Also support Aux input ,adjustable 12/24h system digital alarm clock, and sleep mode. EXCELLENT BRIGHTNESS CONTROL---1.4 large amber LED Display with adjustable display brightness (Auto&Manual) for a nice dark sleep environment and automatic daylight saving time adjustment. DUAL ALARMS &FM RADIO---Dual alarms allow you to set two separate wake timesthere is also a 9 minute snooze function. Perfect for heavy sleepers. Radio reception and sound quality is good with modern look. BLUETOOTH FUNCTION---You can connect your phone or tablet easily to play your favorite playlist. 100% GUARANTEED QUALITY---Customer support via email.Contact us with any questions or concerns for support You can easily adjust the Time Zone by pressing the SET button until the &#034;hour&#034; flashes, then press Tune Up or Down to change the hour of the time. Daylight Saving Time (DST) was installed and CKS503BTwill switch the time automatically. (You can also turn it off manually if your area does not need DST switching) Backup battery was installed and it can keep your time evern AC Power Source was gone. Clock display brightness will be changing acccording to the lighting condition, brighter when undersunshine or lights on, dimmer when in the dark. 3 steps manual dimmer control for you to choose the brightness of the display you want. The birghtness of the display is manily controlled by the auto brightness control setting. It is normal when you foundless effect on adjusting the dimmer manually under very dim condition. Two independentAlarms with individual wake to Buzzer andwake to Radio Alarm Volume Level can be controlled and setup individually. Gradualy increase alarm volume makes you wake upin comfort. Single day / Weekdays / Weekend / Everyday alarm setting gives you more flexiable choice. Snooze function can delay the wake up alarm for another 9 minutes, it can be repeated up to one hour. Sleep to Radio Timer, you can set the radio on before sleep, countdownfrom 10 to 90 minutesand it will be turned off automatically. Digital Tuning FM frequency. Memory up to 10 Programmable Radio Stations. External Wire Antenna for easy reception anywhere. USB Port for phonecharging of DC 5V up to 1.5A that can charge your mobile phone or USB device at your bedside. 3.5 mm Audio Jack can connectother audio device to the clock to play music.