Installation is more convenient: direct serial read, all pins lead to electronic building blocks interfaceHigher Sensitivity: Advanced RF Receiving Line, Embedded Microcontroller Design, Efficient Decoding AlgorithmMore compact size: the full version of the design optimization, rational wiring, practical superior performanceSupport external antenna.Maximum effective distance up to 50mm.Support EM4100 compatible read only or read/write tags.model: RDM630colour: as shownMaterial: PlasticPackage Contents:1 x Wireless Module kit(Some accessories have random colors, don't accept the specified color)Only the above package content, other products are not included.Note: Light shooting 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.