•【Multi-function】LED time display, date, ℃/℉ temperature mode. •【Self-adjusting Brightness】The brightness is 30% during the period from 7 pm to 5:59 am the next day; from 6 am to 6:59 pm, the brightness is 100%. •【Memory Mode】1. Memory travel time without power supply. 2. Without power supply and battery, it remembers the previous clock and various setting modes. •【Alarm Function】There are 3 groups of alarm clocks, which can be set according to personal needs. •【Voice Control】Press DOWN to turn on the power saving mode, and turn off the display after 15 seconds. When the external sound reaches 75db, it redisplays for 15 seconds. Specifications: •Name: LED digital clock •Model: 668 •Size: 21.5*8.5*3.8cm •Power: DC 5V •Material: ABS •Power cord: USB port, 1.8 meters Package included: •1 x Clock •1 x USB Cable •1 x English User Manual