MANO SIM card slot, easily accessible from the top of HAT. The cooling fan is designed for active cooling mode, which can discharge heat in time. Both LED and fan have switches, which can control LED and fan separately, and there will be no glare when used at night. Pi-3G-4G-LTE-HAT-With-FAN 3G/4G and LTE Base HAT for Raspberry/for Tinker Board/for /for Rock64 Media/for Liber Computer Boards with Cooling Fan and Auto-Color Changing LED. Fully compatible with for models with 40-pin GPIO header (5, 4, 3, 2, B+). Supports Mini PCIe modules from the following : For Quectel: EC25/EC21/ EC20 /UC20/ LTE-EP06 For : AirPrime series For Telit: LM960, LE910V2, HE910, LE910Cx For : ME909s-120, ME909s-821, etc. For Simcom: SIM7100, SIM7230, etc. For : ZM8620, etc. For : MPCI-L2 series For Thales: PLS62W, mPLS8, mPLAS9 Compatible with the following motherboards: For 5, 4, 3, 2, B+ For Tinker Board For Rock 64* For motherboard For Latte Panda Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Colour:Black Material:PCB Package Contents: 1 * Extended board Kit(Accessories color and appearance are random, no specification is accepted) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.