Conditon: Brand New Item Type: Car LED Display Screen Material: ABS Color: As Pictures Shown Size: Approx. 105 x 183mm/4.1 x 7.2in Bluetooth: Using Bluetooth Version 5.0 Support USB 5V/1.0A Charging Support Mobile APP to Send Emoticons Support More than 17 Dynamic Emoticons Support RGB 7 Colors (Red, Green, Blue, Yellow, Cyan, Purple, White) Display LED Resolution: 512 Dot Matrixs Support Low Voltage Prompt Detection Battery: Built?In 4.2V/1700mAH Rechargeable Battery, Low Power Consumption Mode Standby for More than Half a Year, 70 Times Daily Usage, Can Work for One Month. Mobile Phone and Device Connection Distance: More Than 6m / 19.7ft 1、Car LED emoticon pack Al intelligent interaction, driving safety partner, supports for Android and for IOS smart phone. 2、Supports APP manual control with your phone, select the corresponding expression and interact with the rear car. 3、LED resolution up to 512 dot matrixs, Supports 17 dynamic emoticon as well as customized ones. 4、Built?in 4.2V 1700mAH rechargeable battery, supports USB charging and low voltage detection. 5、Low power consumption of more than 1 month work time, transmitting distance no less than 10m/32.8ft. 6、Supports RGB display of 7 colors: red, green, blue, yellow, cyan, purple, white. 1 x Car LED Display Screen 1 x Bilingual Manual(English, Chinese)