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Canary Bird Tone PCB Inside Parts. OEM Customization: Supports OEM for any design and voice customization. High Decibel Output: Loud sound reaching 110dB at 30CM distance. Wide Voltage Support: Compatible with AC 110V-240V power supply. Long Service Life: Reliable quality ensuring usage for more than 5 years. Global Export Experience: Exported to over 20 countries worldwide. Compact Design: Small unit dimensions of 5.8*3.2*3CM.