Set of 2 wireless home intercoms, two-way calling, ultra-long range portable wireless voice intercom for the elderly, inter-room communication, call bell

Specifications: Power Supply: 1800 mAh Lithium-Polymer Battery; Battery Power Supply: DC5V/1A; Operating Temperature: -20°C to 55°C; Transmission Distance: Approximately 1000 meters open space, 20 to 100 meters through walls, floors 1 to 8; Operating Frequency: B frequency 462 MHz, A frequency 434 MHz; Battery Life: Approximately 1 week on a single charge; Charging Time: Approximately 5 hours to full charge; Standby Time: 3 to 5 days; Volume Adjustment: 3 Adjustable Speeds; Music Tones: 38 ringtones; Ringtone Volume: 3 adjustable levels (volume control button on the device in standby); Call Volume: 3 adjustable call volume levels (volume control button during calls); Color: Black, White (optional); Product Dimensions: 11.6 x 5.6 x 1.8 cm / 4.6 x 2.2 x 0.7 inches. Charging station dimensions: 7 x 5.6 x 2.9 cm / 2.8 x 2.2 x 1.1 inches. Caution: Two doorbells must be used together and cannot be used alone. Note: Due to different display screens and lighting effects, the actual color of the item may be slightly different from the color shown in the pictures. Package List: 2 indoor doorbells; 2 charging stations; 1 small 2.0 screwdriver; 1 charging cable for charging stations; 1 charging cable for the main unit; 1 instruction manual; 1 strong adhesive.