Desc:Product DescriptionProduct DescriptionThis kind of laser bird repellent is mainly suitable for the dimly lit environment and it will emit a green lase...
Desc:Product DescriptionThe TCRT5000 infrared sensor continuously emits infrared emitting diodes when there is no emitted or reflected infrared reflected b...
Desc:Why choose GRAND?1.GRAND Medical is a new merged medical manufacture, we are the manufacture, the former brand is YUDA. We are the largest medical man...
Desc:Intoduction:This photoelectric smoke detector detects smoke by a couple of infrared diodes. The principle of detecting is granule in the smoke can ref...