VISION DISTANCE ALARM

The utility model relates to a vision distance alarm, which comprises a case body with a hole and a ribbon-shaped fixer, wherein, the case body is provided with power supply, an emitter, a receiver, and a signal output device. When used, the utility model is worn on the wrist or the finger of a pers...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	LU RUIDIAN
Format:	Patent
Sprache:	eng
Schlagworte:	ALARM SYSTEMS ORDER TELEGRAPHS PHYSICS SIGNALLING SIGNALLING OR CALLING SYSTEMS
Online-Zugang:	Volltext bestellen
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