Raspberry Pi 4 Model B X400 I2S Audio Expansion Board and Metal Case with Heatsink Kit for Raspberry Pi 4B Only

Note: When connect extra PWR power control switch to control the X400 board kit, please remove the jumper cap on the PWR (on the X400 board beside the 3.5mm jack headphone), or the power switch will not work normally. The Raspberry Pi 4 board is not included in the packing list. WIKI:  raspberrypiwiki.com/index.php/X400_V3.0 Packing list Bundle 1: 1 x X400 V3.0 Board 1 x Metal Case for X400 V3.0 & Raspberry pi 4 1 x US 12V 5A Power Supply 1 x  Install Screws Pack Bundle 2 : 1 x X400 V3.0 Board 1 x Metal Case for X400 V3.0 & Raspberry pi 4 1 x EU 12V 5A Power Supply 1 x  Install Screws Pack Bundle 3 : Bundle 1+ 1 x Embedded Heatsink Bundle 4: Bundle 2+ 1 x Embedded Heatsink Overview: This is a Raspberry Pi DAC Full-HD Class-D Amplifier I2S PCM5122 X400 Audio Expansion Board with case and power supply kit for Raspberry Pi 4 Model B board. Geekworm design X400-C4 Case is a metal case that match with RPi 4 and X400 well. All port