Wireless intercom doorbell no wiring required built-in wireless signal two-way intercom one-button remote unlocking

ANJIELO SMART1 km long-distance hands-free wireless intercom doorbell, supports up to 5 devices to connect, can freely combine 1V4, 2V3, 3V2, 4V1, a house can install multiple systems without mutual interference, after successful pairing, there is no serial code; can connect to electric lock to open the door, can remote control to unlock      1. wireless intercom doorbell no wiring no network required built-in wireless signal two-way intercom hands free supports wireless remote unlocking Adopting 433MHz public channel, with long wireless distance and strong transmission(about 800-1000 meters in open space, indoor 1-6 floors) 18650 battery powered, low-power consumption, ultra-long standbytime. Wireless unlocking box design, Tap the key to unlock, easy to install and portable size. white Black  Outdoor unit: Power supply: DC5V lithium battery 18650 (1200mA) Support solar charging (optional) Two charging ways:Type-Cport and two-pin terminal. Standby time: ≥ 260 days (120