Features: Long-Range Communication: This wireless two-way intercom system offers a tested range of up to 300 meters. It maintains clear communication through walls and floors, supporting use across multiple levels (e.g., 1st to 8th floor). Suitable for home, office, or elderly care applications. Slim and Sleek Design: With a thickness of only 18 mm, it is slimmer than many comparable models. The high-gloss UV-treated surface and plastic + silicone button structure provide an enhanced tactile experience. Intelligent and User-Friendly: Features include a talk indicator light and battery status indicator for easy monitoring. Includes a dedicated charging dock for convenient and efficient charging. High-Capacity Battery: Equipped with an 1800 mAh polymer lithium battery. Provides approximately one week of operation under typical usage (5 calls per day, 30 seconds each). Standby time is 3–5 days. Versatile and Adjustable: Offers two operating frequencies (462 MHz and 434 MHz) to help minimize interference. Includes 38 ringtones and three adjustable volume levels for both ringtones and call audio. Note: Two units must be used together as a pair; individual unit operation is not supported. Specifications: Power Supply: 1800 mAh polymer lithium battery Input Power: DC 5 V / 1 A Operating Temperature: –20 °C to 55 °C Transmission Distance: Up to 1000 meters in open space; 20–100 meters through walls or floors (supports up to 8 floors) Operating Frequencies: 462 MHz (B-band), 434 MHz (A-band) Battery Life: Approximately 1 week per full charge Charging Time: Approximately 5 hours Standby Time: 3–5 days Volume Adjustment: 3-level adjustment for ringtone and call volume Ringtones: 38 options Color Options: Black, White Product Dimensions: 11.6 × 5.6 × 1.8 cm (4.6 × 2.2 × 0.7 in) Charging Dock Dimensions: 7 × 5.6 × 2.9 cm (2.8 × 2.2 × 1.1 in) Note: Two units are required for operation; single-unit use is not supported. Please note: Actual product color may vary slightly from images due to screen settings and lighting conditions. Package Includes: 2 × Indoor Intercom Units 2 × Charging Docks 1 × 2.0 mm Screwdriver 1 × Charging Station Cable 1 × Host Charging Cable 1 × User Manual 1 × Strong Adhesive Pad