PHYSEN Wireless Door Motion Sensor Alarm,Door Open Chime Detect Alert, Home Security Door Entry Chime with 1 Motion Sensor and 1 Receiver,400ft Range,52 Chimes,4 Volume Levels,Build in LED Indicators;

Simple and Modern
Take Care of Your Child:Alerts when your love one is where they aren't supposed to be
Great for retail or small business environments
Notifies when customers arrive

Specifications:
Maximum 120m/ 400ft operating range
Sensor battery: 2*1.5V AAA Alkaline Battery
Receiver voltage: 110V
Volume range: 25 to 110dB
Detection zone: 8.2ft or 2.5m x 110°
Dimension: Receiver: 87 x 80 x 27.5mm or 3.43 x 3.15 x 1.08in; Sensor: 86 x 55 x 36mm or 3.39 x 2.17 x 1.42in

You can program one chime for one door transmitter and a different chime for the other one, so you know which area to go answer.
Here is how it works:
1.Select desired ringtone by pressing music control button;
2.After choose the ringtone,then long press receiver volume button for about 5-7 seconds until hear receiver "ding" with blue led light flashes
which mean receiver get into pairing mode and it will exit it automatically if it doesn't get signal from transmitter in 5 seconds
3.When receiver get into pairing mode,you should immediately active the motion sensor pair with the receiver in 5 seconds.
You will hear the tone you selected which mean your operation is successfully.
Then on this receiver to choose a different chime for the other one motion sensor and following the above pairing instruction to make them paired is fine.

Here at PHYSEN,we encourage you to make use of our Worry-Free Lifetime Warranty Guarantee.
A happy purchasing experience is the utmost importance to us and we will happily send a product replacement if any issues arise.