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TOPFILONG D456 Bluetooth Headset User Manual

April 22, 2026

D456 Bluetooth Headset Defunc TRUE UI Bluetooth Headset User Manual Specifications Model: Defunc TRUE UI Charging Voltage: 5V (for earbuds) Low Battery Threshold: 3.4V (earbuds), 3.1V (auto-shutdown) Auto-Power Off: After…