diff --git a/usb/README.md b/usb/README.md
index 05ac5ef..cff6618 100644
--- a/usb/README.md
+++ b/usb/README.md
@@ -58,7 +58,72 @@ No details are available regarding internal functioning.
 
 ### TCPP-20009/TCPP-20012
 
-No details are available regarding internal functioning.
+This controller has two handles (5 power notches and 8+emergency brake notches), a D-Pad and six buttons (Select, Start, A, B, C, D). In addition, it provides a door lamp and a 3.5 mm jack connector to plug a horn pedal. There are two rumble motors, one in each handle.
+
+Internally, it is a HID device with a vendor-specific class.
+
+|                   |                      |
+|-------------------|----------------------|
+| **Product name**  | TAITO_DENSYA_CON_T01 |
+| **Manufacturer**  | TAITO                |
+| **Vendor ID**     | 0x0AE4               |
+| **Product ID**    | 0x0004               |
+| **Serial number** | TCPP20010            |
+
+#### Input
+
+The controller sends reports to the host (PS2) formed by 6 bytes:
+
+| Byte 1 | Byte 2 | Byte 3 | Byte 4 | Byte 5 | Byte 6  |
+|:------:|:------:|:------:|:------:|:------:|:-------:|
+| 0x01   | Brake  | Power  | Pedal  | D-Pad  | Buttons |
+
+The values for the brake notch byte are the following.
+
+| Released | B1   | B2   | B3   | B4   | B5   | B6   | B7   | B8   | Emergency | Transition |
+|:--------:|:----:|:----:|:----:|:----:|:----:|:----:|:----:|:----:|:---------:|:----------:|
+| 0x79     | 0x8A | 0x94 | 0x9A | 0xA2 | 0xA8 | 0xAF | 0xB2 | 0xB5 | 0xB9      | 0xFF       |
+
+The values for the power notch byte are listed below.
+
+| N    | P1   | P2   | P3   | P4   | P5   | Transition |
+|:----:|:----:|:----:|:----:|:----:|:----:|:----------:|
+| 0x81 | 0x6D | 0x54 | 0x3F | 0x21 | 0x00 | 0xFF       |
+
+The pedal byte has two possible values depending on the state of the pedal.
+
+| Released | Pressed |
+|:--------:|:-------:|
+| 0xFF     | 0x00    |
+
+The D-pad byte represents the state of the arrow buttons. If two opposite directions are pressed simultaneously, the result is **Center** unless a third button is pressed.
+
+| N    | NE   | E    | SE   | S    | SW   | W    | NW   | None/Center |
+|:----:|:----:|:----:|:----:|:----:|:----:|:----:|:----:|:-----------:|
+| 0x00 | 0x01 | 0x02 | 0x03 | 0x04 | 0x05 | 0x06 | 0x07 | 0x08        |
+
+The button byte uses six bits to represent the state of the physical buttons. **0** means that the button is released and **1** that it is pressed. A bitmask can be used to retrieve the buttons.
+
+| Button 1 | Button 2 | Button 3 | Button 4 | Button 5 | Button 6 |
+|:--------:|:--------:|:--------:|:--------:|:--------:|:--------:|
+| B        | A        | C        | D        | SELECT   | START    |
+
+#### Output
+
+The controller supports receiving data via a control transfer to turn on/off the door lamp and provide rumble. The setup packet is as follows:
+
+| bmRequestType | bRequest | wValue | wIndex | wLength |
+|:-------------:|:--------:|:------:|:------:|:-------:|
+| 0x40          | 0x09     | 0x0301 | 0x0000 | 0x0002  |
+
+The data sent to the controller follows the structure below.
+
+| Byte 1 | Byte 2   |
+|:------:|:--------:|
+| Status | Function |
+
+* **Status:** defines whether the function specified in byte 2 is **Off** (**0x00**) or **On** (**0x01**).
+* **Function:** **0x01** is **Left rumble**, **0x02** is **Right rumble**, **0x03** is **Door lamp**.
 
 ### TCPP-20011
 
@@ -118,7 +183,7 @@ The controller supports receiving data via a control transfer to update the scre
 
 | bmRequestType | bRequest | wValue | wIndex | wLength |
 |:-------------:|:--------:|:------:|:------:|:-------:|
-| 0x40          | 0x09     | 0x0301 | 0x0000 | 0x0002  |
+| 0x40          | 0x09     | 0x0301 | 0x0000 | 0x0008  |
 
 The data sent to the controller follows the structure below.