Customers would like to minimize the time waiting in checkout lines; however, it is often difficult to understand which checkout lane to choose. The present invention embraces a device, system, and method to help customers understand which checkout lanes are open and operating most efficiently. The invention utilizes Bluetooth-low-energy (BLE) transmitters located at each checkout lane to transmit updated information related to (i) the lane's status (e.g., open or in-use) and (ii) the lane's quality (e.g., throughput efficiency). Portable electronic devices used by customers may receive the BLE signals and understand (e.g., using augmented reality) which lane would be most likely to provide a quick checkout.