Cheap And Discounts CC2541 Bluetooth Wireless Module EBYTE 2.4GH BLE4.0/5.0/5.1 2.4Ghz 1mW PCB Antenna SMD E104-BT01 Transmitter Receiver RF Module Wholesale. Buy Directly From Merchant EBYTE IOT Factory Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.