Plug Type:US Plug,it applies to Canada, , 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 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 receivers. One receiver can be matched with transmitters as . 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 receivers. One receiver can be matched with transmitters as ., and with memory function once off power. Transmitter: Solar cell Working reference :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 are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.