At a glance:
Razer Chroma HDK module with 4 lighting channels
Includes 2 LED strips
Install inside or outside your PC case
Works with Razer Synapse 3 and Chroma Studio
Razer Chroma SDK enabled

Specs:
Razer Chroma HDK with 4 channel lighting output
USB connection for data and power
DC output for additional power and brightness
Included Molex to DC power adapter for internal case lighting
Double sided adhesive tape for mounting
Razer Synapse enabled
Razer Chroma SDK enabled

Size and Dimensions:
Razer Chroma HDK: 10 cm / 3.9 in (Length) x 7 cm / 2.7 in (Width) x 1.5 cm / 0.6 in (Height)
LED strip length: 50 cm / 19.6 in
Extender cable length: 30 cm / 11.1 in
Micro USB data cable: 100 cm / 39 in
USB to DC power cable: 150 cm / 59 in
4-pin Molex to DC cable: 30 cm / 11.8 in

Package Contents:
Razer Chroma HDK module
2 LED strips (16 LED’s each)
2 Extender cables
Micro USB data cable
USB to DC power cable
4-pin Molex to DC cable
DC power adaptor