🔧 #BluetoothTesting Just explored JL(JieLi)'s nifty Test Box dial functions!

Handy features:
✅Call testing mode
✅Mic loopback (2 output options)
✅One-touch quick test
✅Auto-correcting freq offset

Perfect for #AudioEngineers working on:
• #TWSEarbuds
• #BluetoothSpeakers
• Voice-enabled devices

The physical dials make testing so much smoother than software controls. Anyone else using this test box? #HardwareHacking

Visit [BLE Voice] to get sample [https://www.aliexpress.com/item/1005009341811241.html]