Black Door Sensor by Coolqiya | 3 Sensors & 2 Receivers

Certified with CE, FCC, and RoHS, this device offers long-range transmission up to 400 feet in open air. It's wireless and allows for multiple door bells or chimes, easily expandable up to 10 more. Enjoy 52 different ringtones and four volume levels that retain settings even after power removal. The strong signal works through various materials like glass, metal, and wood. Use it as a door entry alert system for homes, garages, offices, or retail stores. Easy to install, the chime is wireless and battery-free, simply plug it in. The remote doorbell is battery-powered and can be mounted using sticky pads or screws. It operates on 110 V or 220 V and is made of ABS plastic, weighing 6.4 ounces. Includes 3 door sensors, 2 chimes, 6 batteries, 3 self-adhesive tapes, and a user manual.

• Safety Certified: CE, FCC, RoHS
• Extended Range: Up to 400 ft in Open Air
• Expandable Chimes: Add Up to 10 More Door Bells or Chimes
• Customizable Ringtones: 52 Options with Volume Control
• Versatile Signal Strength: Compatible with Various Door and Wall Materials
• Versatile Usage: Monitor Children or Use as Entry Alert System
• Easy Setup: No Complex Installation Required
• Power-Efficient Chime: No Batteries, Plugs into Socket
• Battery-Powered Remote: Use Sticky Pad or Screws for Mounting
• Voltage Compatibility: 110 V / 220 V
• Durable Material: ABS Plastic
• Lightweight Design: 6.4 Ounces