Basketball game loudspeaker referee buzzer loudspeaker volleyball game buzzer foul

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Three-color button plug-in type, 220 volt plug-in
Independent large button plug-in use model (recommended) 220 volt plug-in
Three-color button built-in lithium battery, send repeated charger
Independent large button built-in lithium battery (recommended) for repeated charger
Dual audio input and output sheet metal model, high-end recommended model
Dual-sound belt lighting sheet metal high-end model 220 volt plug-in
High-end 120db buzzer 220v power supply 220volt plug-in
Professional dual tone type (loud) 220 volt plug-in
Professional dual tone Dual light Audio output to audio Adjustable volume

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sort by color:: Three-color button plug-in and use type Independent large button plug-in and use type (recommended) Three-color button built-in lithium battery Independent large button built-in lithium battery (recommended) Dual-sound tape optical audio input and output

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