Technical index：                                                                                                                                                           

① Use Bluetooth version 5.0

② Support USB 5V / 1.0A charging

③ Support mobile phone APP to send expression commands

④ Support more than 17 kinds of dynamic expressions

⑤ Support RGB 7 colors (red, green, blue, yellow, cyan, purple, white) display

⑥ LED resolution up to 512 dot matrix

⑦ Support low voltage prompt detection

⑧ Built-in 4.2V / 1700mAH rechargeable battery, low power mode standby for more than half a year ; If for 70 times daily usage, it can work for one month.

⑨ The distance between the mobile phone and the device is more than 10 meters。