Plug-and-Play Grove Connection Built-in CC1101 433MHz RF Chip Optimized for Bruce Firmware Durable and Signal-Stable Design CC1101 RF Module for M5Stack Cardputer (No Device) Connects directly to for M5Stack Cardputer via Grove interface-no wiring or jumper needed, fast and stable setup. Equipped with the CC1101 module for reliable 433MHz wireless communication and RF experimentation. Fully compatible with Bruce firmware on for M5Stack Cardputer; recognized automatically through the RF-CONFIG menu. High-quality PCB and antenna interface ensure low interference and steady RF signal transmission. Notice: For educational and research use only. Color: As Shown Material: plastic Package Contents: 1*Module 2*Antenna 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.