DIGITAL CLOCK RADIO WITH STEPLESS DIMMER: K5 is a Bluetooth speaker, alarm clock, FM radio and USB music player, 4 in 1. The brightness of the 4-inch LCD screen controlled by a dial wheel is stepless adjustable full range, not dazzling at night and easy to read by dayDUAL SEPARATE ALARMS: Dual alarms with separate 7-5-2 mode meet your various needs. 3 build-in tones or radio channel as wake up sound, 16 levels volume, loud enough for heavy sleepers. The big snooze button at the top can be easily found in dark and offers extra 9mins each pressBLUETOOTH SPEAKER & USB PLAYER: K5 can be connected via Bluetooth 5.0. You can also insert your USB stick to play the music inside. No matter in radio, Bluetooth or USB mode, volume is independent of the alarm clock volume. A great multifunctional alarm clock for bedroomFM RADIO & SLEEP TIMER: FM radio mode can automatically search stations and store in order. You can also set the specified radio station as wake up sound. The sleep timer offers 10-120 mins count down in radio/Bluetooth/USB mode, accompany you to sleep peacefully.BATTERY BACKUP & USB C CHARGER: 3 AAA batteries(NOT included) are required as backup power in case of AC power failure. Everything you set will be saved, no worry to miss the alarm. 2 USB charging ports(1A & 2A) on the front and a USB C on the rear, a convenient charging station for you