Motor Limit: 3S LiPo or 9 cell NiMH: 540 or 550-size motor great than or equal to 18 turn

- Two (2) Black Ex Hard springs

It is based upon the cutting-edge FM-A Chassis

Laser engraved HR logo

so no dangerous materials are used during lift-off or flight

Hobbywing - Bluetooth OTA Programmer Apparel Adjustable Motor Limit: 3S LiPo orOTA Programmer is a module which adopted the Bluetooth communication technology for transferring data between an ESC and a smart device (Android phone, tablet, and etc). It makes the wireless communication between ESC and smart device possible; the user can easily program and upgrade ESC and monitor data transferring via this unit. The OTA Programmer module works with the following products of HOBBYWING. Some of XERUN series & EZRUN series of car