Features:
Intuitive interface design and easy to use
One-button start and quick pairing
Programmable and customizable buttons 
ABS-surface for impressive touch 
Support all the Bluetooth products of Makeblock
The Bluetooth Controller supports all the Makeblock Bluetooth products: mBot, mBot Ranger, Ultimate 2.0, Airblock, Codey Rocky etc. 
Powerful anti-interference makes it perfect for complex applications
Impervious to interference with 60+ simultaneously-working controllers within a distance of 10m.
Program your controller to customize the buttons
When your Bluetooth controller is paired with a Makeblock Bluetooth robot, you can download the extension file for Bluetooth Controller and upload it to the robot. Next, you can program to customize the functions of buttons.
P.S A new feature of Bluetooth controller is on the way: remote-control the animations and games designed via mBlock (PC).
Specifications
Name: Bluetooth Controller
Material: ABS
Working current: ??25mA
Bluetooth version: support 4.0+
Transmission distance: 20m
Transmit power: 4dBm
Data transmission:
Low-latency, packets can be received via Bluetooth
  device within 100ms
Battery: 2 AA batteries
Support platforms: MacOS/Windows