Sonnette interphone solaire sans fil ultra longue distance 2000M – Kit 1 unité extérieure + 1 unité intérieure, communication bidirectionnelle

CONTINUOUS SOLAR CHARGING: Solar energy is continuously charged, and when fully charged, the outdoor unit is used 3-5 times a day, with a battery life of about 12 months. Internal and external units are equipped with 1800mAh rechargeable lithium batteries, ensuring long battery life. ANTI-INTERFERENCE: With 16 separate channel options, it can easily avoid interference in wireless frequency bands. 2000M ULTRA LONG CALL DISTANCE: With professional chips, in flat and open areas, theoretical call distance can reach 2000M, making your most convenient. Adopting a radio frequency of 462MHz, the signal coverage is wider and the crossing of walls is simpler. 3-LEVEL VOLUME ADJUSTMENT: Seniors can also hear it, with a maximum volume of no less than 112 decibels. The doorbell can be heard both in the bedroom and in the kitchen, with 30 built-in ringtones and multiple melodies to choose from. Multiple scenes of use: this doorbell is suitable for homes, villas, businesses, tea rooms, offices, host families and other areas.