Seeed-Studio-Grove-Serial-Bluetooth-v 3-0-Seeed-Studio-113020008-The-b-Grove-Serial-Bluetooth-v 3-0-b-is-designed-for-transparent-wireless-serial-connection-&-is-compatible-with-the-b-Grove-Base-Shield-b-br-br-The-module-has-fully-qualified-Bluetooth-V2-0-EDR-Enhanced-Data-Rate-2 Mbps-modulation-with-complete-2-4 G Hz-radio-transceiver-&-baseb&-It-uses-the-CSR-Bluecore-04-External-single-chip-Bluetooth-system-with-CMOS-technology-&-with-AFH-Adaptive-Frequency-Hopping-fe