Mini 5.4mm Wireless Bluetooth Ble 5.1 Data Module For Gatt Central/peripheral. Discover the Ultra-compact Bluetooth Low Energy (BLE) 5.1 Module, Ideal for a Wide Range of Applications. The FSC-BT690 Seamlessly Integrates a 2.4GHz Transceiver and Micro-controller, Supporting Up to Three BLE Connections. Its Compact Dimensions Make It Perfect for Space-sensitive Projects. Key Features: - Bluetooth Low Energy (BLE 5.1) - Supports GATT Central & Peripheral Roles - Interfaces: UART, SPI, I2C - Ultra-small Size: 5.4mm X 5.8mm X 1.2mm - Dedicated Link Layer and AES-128 Encryption Processors - 32KB One-Time Programmable (OTP) Memory Applications: - Beacons - Medical Devices - Proximity Tags & Trackers - Smart Watches - Human Interface Devices (HID) - Industrial Applications. Your order tracking code will be sent on shipping and takes up to 5 days to show live information.