** Bluetooth version 5.0
** Supports USB 5V/1.0A
** Supports mobile app to send instructions
** Supports more than nine dynamic expressions
** Supports 8 RGB colors display
** LED resolution up to 512 dot matrix
** Support low voltage prompt detection
** Support day and night brightness display
** Low power mode standby for more than half a year
** After each charge is completed, 70 usages per day, can work for one month
** Built- in 4.2V/ 1700mAH rechargeable battery, which can be used for about 2 months after each charge.
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