【Strong Signal】150M/500Ft long range. The cordless door chime will never miss to alert you when someone shows up at the door. The black doorbell does not interfere with other equipment in your home. 【Waterproof Sensitive Transmitter】Battery required and extreme-low power consumption. Dustproof and waterproof IP44 for the push button, the working temperature of this wireless doorbell ranges from -20-60℃. Never interfere with your other electronic equipment. 【36 Ringtones 3-Level Volume】 The well-made stereo speakers provide 36 tunes, which are also very friendly to sleeping children or the elderly. Press the bell button to easily select 36 melodies, and press the volume button to set 3 volume levels. In addition, this battery doorbell also includes a memory function for sound and ringtone selection. 【Easy to Install】The chrome wireless doorbell, compared with plug-in doorbell without the hassle of cables. Just hang the mini receiver(not including battery) into a hook or nail, and fix the transmitter (including battery) on a wall with the double tapes. When someone rings the bell, the blue LED flashes. It's also can be a caregiver pager, easy for caring for all family members. 【100% Risk-free Satisfaction】Each Aigostar doorbell will be meticulously tested by our in-house engineering team to proactively address and prevent design or mechanical issues. If there are any problems, doubts or suggestions, please do not hesitate to contact us., Manufacturer: Aigostar