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    Meian Outdoor Wireless Waterproof Doorbell Attention: 1. Before using the doorbell, please check and pair it; 2. If you buy more than one doorbell or button, please repeat the same steps for pairing; 3. Please pair in a confined space so that the doorbell will not be affected by other devices of the same frequency.   Features: 1.Long Operating Distance: With a reliable wireless range of 1,000 ft (300m) and strong signal penetration. 2.IP65 Waterproof: IP65 waterproof and functional between -4 °F to 140 °F, the doorbell can operate in even the harshest weather conditions. 3.5 Volume Adjustable: The silent volume level doesn't disturb a sleeping baby and the maximum level of 110 dB is hearable by the hearing-impaired or even during a party. 4.Music to Your Ears: 60 rich ringtones for you to choose from. 5.Memory Function: Thanks to its smart memory function, it remembers your previous set melody and volume level - even after a power outage. 6. High Quality Material: Made of ABS fireproof material, UV resistant, anti-corrosion, and 3-year non discoloring   60 Chimes and Tunes Select your favorite music by switching between previous and next tune, choose the chime we like best   5 Adjustable Volume Level 0-110dB, 5 levels of volume, easy to switch according to different usage scenarios 3 Modes LED indicator and mute mode, the perfect choice for nap time and baby sleeping Ultra Long Wireless Distance With a reliable wireless range of 1,000 ft (300m) and strong signal penetration, never miss a visitor or delivery IP65 Waterproof IP65 waterproof, -10°C-50°℃ working temperature, can be used in rainy and snowy weather, safe and stable High Quality Material UV resistant, anti-corrosion, 3-year without yellowing Easy to Install Simply plug the doorbell receiver into the socket and paste the doorbell button onto the wall to complete the installation Multiple Combinations Supports pairing of 20 doorbells/ buttons 3-Step Pairing 1. Press and hold the "Previous Tune" on the doorbell for 2-3 seconds, and the LED light remains on. 2. Press the doorbell button to pair. 3. The LED light flashes and there is a "beep" sound, pairing is successful, press any button to exit.   Attention: 1. If you need to pair more than one doorbell or button, please repeat the same steps for pairing; 2. Please pair in a confined space so that the doorbell will not be affected by other devices of the same frequency.