Intey Wireless Doorbell Home House Cordless Portable Kit Push Button and Receiver( No Batteries Required for Receiver) 1000-feet Long Range Over 50 Chimes COOL DESIGN - Many, many ring tones(over 50 chimes) to choose from, easy to adjust volume(25~110dB). Works perfectly and its a decent design, cool color. INSTALLATION COULDNT BE EASIER: Stick the button where you want it, plug the chime box in your desired outlet. Wireless signal is already set and all you needed to do is adjust the volume (4 level) and change the pre-set ringtone (52 Chime) to what you like. NEVER MISSED YOUR GUESTS: Wireless doorbell operating of 500 feet / 150m indoor, 1000 feet / 300m in open area. Bright and can be seen easily, blue light grows when your guests push the button, so they know it has worked, loud sound of the receiver so you can hear it clearly. GUARANTEE: All products passed FCC, RoHS approval, waterproof--IP33 Waterproof for the Transmitter, so its acceptable for outdoor use. SATISFACTION WARRANTY: If not 100% completely satisfied, such as not loud enough as you like, not easy install as we describe, etc. simply contact us to request a refund or exchange. 3 month money back/ replacement guarantee, 24 months product defect free replacement Warranty.