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 EZRUN series; Brushless ESCs for some UAV models of the PLATINUM series; Some Rc boat brushless ESCs of SEAKING 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 Hobbywing HW The Link 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 HOBBYWING HW Link APP): 1. Android Version Users can download the app from HOBBYWING website or GOOGLE PLAY. 2. iOS Version Users can visit Apple's App Store, search "hobbywing", and click the "download" icon to download the app Different batches may have different screen printing/appearance, but it will 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.