Only a couple of reviews on Amazon where it costs $16.42. Reviews are both 4/5 and say that it's a good product for that price.
Easy to install with no wiring
• Battery operated
• Chime, alarm, delay settings
• Magnetic sensor technology
• Perfect for doors, sheds, and garages
• Alarm can be activated with panic button
• Loud 110dB alarm
• 30-Day Yugster Warranty
What's In The Box?
• Pro Security Keypad Alarm System
• Weight: 16 ounces
• Requires 3 AAA batteries (not included)
• Model: OA623