SL2.2S-USB conversion chip,Onboard blue AIR78OE network status indicator light Low power consumption, sleep power consumption as low as 60OuA Easy loading and unloading, plug and play Flip up nano SIM card holder, easy to install and remove USB extension with three Type-C ports. Onboard 4G antenna to enhance network signal. The Air780E equipped with it is LTE Cat.1 bis communication launched by Communication Module, 4G full network, plug and play, adaptable to different operators and products, default to AT firmware, onboard SL2.2S-USB conversion chip. Connect the for Zero to the USB signal cable of the module through a top pin to achieve USB 1-to-3 Type-C port expansion, plug and play, commonly used pin leads for easy secondary development. The silk-screen appearance from batch to batch, but it does not affect the use; the actual product may have color difference due to different light or display. Colour:Blue Material:PCB+Electronic component Package Contents: 1x 4G HUB expansion board 1x pin header 4x copper pillars 8x screws 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.