Note: Motherboard numbers and micro-SD card slots may vary from batch to batch.

Only motherboards from 2013 to 2019 support NTRBOOT, not those from 2020 onwards.

Website picture update until 2022, the subsequent motherboard pictures are subject to dealer sales.

Newly produced R4 card WOOD PLUS marked www.r4iwood.cn, the official R4 website no longer provides comparison pictures, please refer to the products purchased by dealers.

R4 WOOD PLUS mark and R4 SDHC mark are both our company's products. 

www.r4isdhc.com.cn and www.r4iwood.cn are both R4 official domain names.