36 Ringtones Wireless Welcome Doorbell Infrared IR Motion Sensor Doorphone Entry Sensor Alarm Features: New ABS shell, durable and sturdy. Separate design, more conenient. Remote transmission range up to 280M/918ft in the open air. Shop Keeper in day time, anti-thief in the night, welcome/doorbell/alarm/color lights/lighting 5in1 multi-function. Colorful LED lights,adjustable brightness, distinguish multiple entrances by different colors. 4 stages adjustable volume(Loud/High/Middle/Low)from 113-25dB. 2 power supply modes: Battery powered/Powered by DC 5V micro 8 chord music chip, 40mm big horn, 36 chime melodies, remember your last set melody and volume level once powered off. Receiver can learn from up to 32 wireless sensors like PIR motionm magnetic or vibration sensor as well as up to 8 remote controllers. Apply to shops, Commercial Complex,Luxury hotels,offices, factories, homes, villas, driveways, walking paths, Supermarkets, retaurants, etc. Specifications: Color: white Material: ABS Power Supply: 1) Battery: Transmitter: AAA 1.5V *2 (not included); Receiver: AAA 1.5V *3 (not included) 2) Powered by DC 5V micro Working Current: <1mA Working Temperature: -20℃ -70 ℃ Receiving Frequency: 433MHz Receiving Distance: ≤100m Ring Tones: 36 songs Transmitter Detection Angle: up and down 110°, left and right 15° Transmitter Size: 8.0*4.5*3.9cm/3.1*1.8*1.5in Receiver Size: 9.5*6.4*2.3cm/3.7*2.5*0.9in Package Weight: 211g/7.4oz   Pacakge List: 1 * Transmitter (Not include battery) 1 * Receiver (Not include battery) 1 * User Manual 2 * Brackets 1 * Installation Kit Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.