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promotional wireless remote control key finder This product is a new style goods finder for family and personal,it is themostconvenient and practical new technology product.goods finder compose with emitter and receiver, via emitter's (remote controle unit) counter receiver(wireless receiver) ,it will send out warning sound B.B.B and LED light flashing ,which will let you find the goods that you are looking for. Products specialties: 1.This goods finder have international advanced power energy saving system,high precision panelmachine design,little shape,wireless emitter and receiver code matching function,It willnot mis-coding and cause error sound ,with high interruption resisting.Wirelesscontrol distance is 30 20 meters;It has rest waiting state energy saving function. Both emitter andreceiver will be at rest waiting state until you press the button,then it willstart working! Power- consuming rate is 2UA. 2.Receiver shape is smooth and nice,when getting the signal from emitter, it will response immediately.If emitter does not send out goods-finding signal, receiver will be atreststate. once press emitter 1 or 3 button,then the counter receiver will begin to work, and voice out B,B,B sound and LED light flashing. Using once piece of CR2450 button battery,power voltage 3V/capacity 600mah,Battery using longest time is up to 3 5 months. 3.Goods finder remote control unit shape is nice and decent, this product has 4 keys,6 keys and 8 keys series,1 remote control unit can look for several receivers( goods),using 1 piece of 12V27A battery,after 6-10 months,please pay attention to powerenergy or change battery.