Bluetooth LED Advertising Cap Supports Scrolling Characters/Mobile Phone Word Change/Multi-Language，Random Color Delivery Power Splitter The catalytic converter tester allows

The catalytic converter tester allows you diagnose problem areas in the back pressure of your exhaust system

One Package Size 32cm * 26cm * 6cm / 12

Scanning mode: manual

and laptops with Bluetooth

Bluetooth LED Advertising Cap Supports Scrolling Characters/Mobile Phone Word Change/Multi-Language，Random Color Delivery Power Splitter The catalytic converter tester allows1. Material: cotton cap + LED display 2. Resolution: 12x48 dots 3. Font color: red yellow blue green white pink color, etc. 4. Hat color: red black white blue yellow green pink etc. 5. Display size: 133 x 29 mm 6. LED screen size: 152x32 mm 7. Communication method: Bluetooth mobile phone APP (support IOS system and Android system) 8. Language: Multi language (Chinese Korean Japanese English and other multi national voices) 9. Power supply: 3. 7V