OTA Programmer product description:Product name: OTA Programmer Working voltage: 5-12.6V Support Bluetooth version: above 4.0 Bluetooth signal effective distance: 0-3 meters (open area) Scope of application: Brushless ESCs for some Rc vehicles of XERUN and series; Brushless ESCs for some UAV models of the series; Some Rc boat brushless ESCs of series; Support all ESC models that can be used with the WIFI setting card. Wireless connection to smart phones, powerful dedicated APP The ESC establishes a wireless connection with the smartphone through the OTA Programmer, using the APP clearly displays and adjusts all the parameters of the ESC, and the interface is friendly and clear at a glance. Be sure to download the version of the V2 App, the old version of the App cannot be supported; the download method is as follows: Download (of Link APP): 1. Android Version Users can download the app from website or PLAY. 2. iOS Version Users can visit 's , search "", and click the "download" to download the app Different batches may have different screen printing/appearance, but it not affect the use Colour:Black Material:Plastic + Metal Package Contents: 1 x OTA Programmer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.