Plug Type:US Plug,it applies to Canada, India, Japan, Mexico, Thailand, the , the Philippines and so on. unique and elegant style Transmitter using solar power, power saved and durable Range in open spaces: Max. 200-300m 52 varied style of tunes for optional. One tunes can be matched one than more receiver. Ringtones: 52 Colour: Black Material: ABS 4 levels adjustable volume including silent mode One transmitter can be matched with several receivers. One receiver can be matched with several transmitters as well. Add transmitter or receiver plug into the socket, press volume button for 6 seconds, blue led light keep on, then press transmitter button, when receiver blue led flash, means pair successfully. It will fail paring if you can not finished within 6 seconds Attention: One transmitter can be matched with several receivers. One receiver can be matched with several transmitters as well., and with memory function once off power. Transmitter: Solar cell Working reference index:5.5V 25mA 0.13W No string of code Working current:12mA 0.5 second for reaction when pressing the button with light reminder Working range: about 200-300m (on open air) Receiver: Working voltage: 90-260V Standby current: 10mA Working current: 60mA Working Frequency: 433MHZ with the function of night light, Brighting at night or dark Package Contents: 1* Indoor Unit(Receiver) 1* Outdoor Unit(Transmitter) 1* Mounting Base 1* Bag of Screws 1* Tape Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.