Last week, while having skewers with a friend, she complained, “What else can Bluetooth do besides connecting to headphones?” I glanced at the metal keychain on her car keys and chuckled—Bluetooth can handle that. 1. Transferring large files is faster than WeChat. Does your phone always pop up “file too large” when connecting to the computer? Just turn on Bluetooth and select “file transfer”; photos and videos transfer instantly, especially when sending family photos to parents without waiting for ages to load. 2. Car keys hidden in your phone. Many new cars now support Bluetooth keys; just slip your phone into your pocket, and it automatically unlocks the car door when you get close. No need to panic if you forget your keys, and it’s much safer than traditional keys. 3. Smart devices connect more smoothly. Connecting to a smartwatch to check messages or sync workout data, or connecting to a Bluetooth speaker to play music has lower latency than Wi-Fi, so you no longer have to worry about disconnections while playing music in the shower. 4. Health data synchronization. Blood pressure monitors and glucose meters at home connect via Bluetooth, and the data is directly sent to a mobile app, so the elderly don’t have to flip through records, and children can monitor remotely. It turns out Bluetooth is no longer just a “headphone-exclusive tool”; the conveniences it offers can save us a lot of trouble. What do you use Bluetooth for the most? Have you discovered any other hidden skills? Let’s chat in the comments!