Found 7 alternatives for BT680T by Fanstel Corp.. Rf Transceiver Modules And Modems — 40-SMD Module.
SMD MODULE, ESP32-S2, 4 MB SPI F
SMD MODULE, ESP32-S2, 4 MB SPI F
RX TXRX MODULE BT TRC ANT SMD
SMD MODULE, ESP32-S2R2 WITH 2 MB
SMD MODULE, ESP32-S2R2 WITH 2 MB
RX TXRX MODULE 802.15.4 CHIP SMD
RX TXRX MOD WIFI SURFACE MOUNT