Description : Max300m Long Range Solar Power Wirele Waterproof Doorbell Light Control Sensor With Transmitter+ Receiver Door Bell Kit Features: * unique and elegant style* Transmitter using solar power, power saved and durable *Receiver with plug, EU/US/UK models for optional* Range in open spaces: Max. 200-300m* 52 varied style of tunes for optional. One tunes can be matched one than more receiver.* 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. Specifications: Add transmitter or receiver Firstly plug into the socket, pre volume button for 6 seconds, blue led light keep on, then pre transmitter button, when receiver blue led flash, means pair succefully. It will fail paring if you can not finished within 6 secondsAttention: 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 Working range: about 200-300m (on open air) Receiver: Working voltage: 90-260V Standby current: 10mA Working current: 60mA Working Frequency: 433MHZ Package Contents: 1* EU Indoor Unit(Receiver)1* Outdoor Unit(Transmitter)1* Mounting Base1* Bag of Screws1* Tape1* User ManualOnly the above package content, other products are not included.Note: Light shooting 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. Product Photoes Package includes: