D30 Wireless Voice Intercom Doorbell Volume Adjustable Two-Way Talk Doorbell 【Real-time Two-Way Communication】 Experience phone-like communication with this wireless intercom doorbell, allowing for hands-free calls when connected 【Long-Distance Connectivity】 Enjoy clear communication up to 400 meters in open areas, 300 meters indoors, and through 3 walls, ensuring reliable coverage throughout your home 【Compact and Stylish Design】 The doorbell features a cute, compact design with a matte ABS finish for a pleasant tactile experience 【User-Friendly Interface】 Adorned with a charming smiley button and equipped with indicator lights for intuitive operation 【Versatile Sound Options】 Choose from 4 melodious ringtones with 8 adjustable volume levels to suit your preferences Specifications: Outdoor unit power: 1.5V AAA batteries (not included) Indoor unit power: DC 5V/1A Operating temperature: -20 to 60℃ Ringtones: 4 melodies with 8 volume levels Outdoor unit dimensions: 8 x 5.2 x 2.3 cm Indoor unit dimensions: 8 x 5.2 x 1.3 cm Package includes: 1 x Outdoor doorbell 1 x Indoor unit 1 x Screw pack 1 x Adhesive tape 1 x English user manual D30 Wireless Voice Intercom Doorbell Volume Adjustable Two-Way Talk