1、 communicate the doorbell、 receiver (indoor machine) using household power supply、 plug socket can be directly、 do not charge battery、 environmental protection and convenient! Transmitter (seg) use high capacity battery stanza for about a year.2、 super receive suitable for household、 office、 hotel、 building、 dormitory、 factory、 construction site or any services space.3、 use a range with a doorbell、 also won't interfere with each other! Using high frequency wireless transmission techniques、 innovation of same frequency codes and dial the code function、 one yard rang error rate to zero、 effectively avoid the interference of the neighborhood the annoyance and false starts.Warm reminder: this product is empty without obstacles through strict test of direct remote control distance of not less than 280 meters. Barrier effect is much better than the similar products in the industry、 can meet the needs of different family environment、 average household security doors and walls. About 100 meters on the market penetration is unable to match、 sometimes almost impossible to make the signal through the stainless steel security doors! Please select the real thing!The latest production date is 2014!S s product characteristic s sLevel features a: zero electromagnetic radiation、 the pregnant woman living environment.Feature 2: flat panel、 not collecting dust、 clean and convenient.Features three: by tapping the transmitter、 the mouse click of a design、 the service life of more than one hundred thousand times.Features four: waterproof transmitter、 not afraid of weathered.Features five: anti interference will not occur ring.Characteristics of six: a new ABS flame retardant shell、 precision parts、 SMT technology、 workmanship and materials are all the best.Features seven: signal penetration is far better than the same price.Characteristics of 8: adjustable volume and music easy installation and use simple (the first default ding-dong ding-dong)Features nine: low energy consumption、 the receiver is less than once a year、 launchers section battery can use one or two years、 can replace the battery、 the product life is much longer than the so-called no electricity doorbell、 battery supermarket、 grocery stores、 computer city、 hardware stores are available.Characteristics of 10: wireless installation、 convenient and quickTransmitter receiver size: 75 * 80 mm size: 50 * 80 mmType: drag 1 - transmitter (remote control) * 1 + receiver (voice) * 1Remote control power: < 10 mwReceiver: rated voltage AC 50 hz、 220 v / 60 hzReceiver controlled volume: 20-80 db (fourth volume Adjusted the humanized design)Receiver: standby current < 1.0 mAThe receiver plug: the winning straight plug plugWorking frequency: 315 MHZ + 2 MHZInstallation methodBatch of screwdriver to pry open launch for a word、 can use the random distribution of double-sided adhesive stickers、 or punch with screws.Transmitters and dismantling when installation、 pay attention not to touch the electronic components、 the direction of the up and down don't upside down.23 a transmitter using a 12 v battery、 remove insulation plastic gasket before use. When the signal transmitting and receiving is not too sensitive、 replace the transmitter batteries can solve the problem.Receiver into indoor conventional socket can be used.Special note:Product pictures are taken their artwork、 without any PS shipping:The delivery no box