II Pack Intercoms Wireless for Home Voice Bidirectional Caller Ultra Long Distance Portable Features: Long-Range Communication: This wireless two-way intercom system offers a tested range of up to 300 meters. It can penetrate walls and floors, enabling clear communication between floors (e.g., 1st to 8th floor). Suitable for home, office, or elderly care use. 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 a comfortable tactile experience. Intelligent and User-Friendly: Features include a talk indicator light and battery level indicator for easy monitoring. Includes a charging dock for convenient and efficient charging. High-Capacity Battery: Powered by an 1800 mAh polymer lithium battery. Provides approximately one week of operation with typical use (5 calls per day, 30 seconds each). Standby time is 3–5 days. Versatile and Adjustable: Supports two operating frequencies (462 MHz and 434 MHz) to reduce interference. Offers 38 ringtones and three adjustable volume levels for both ringtones and call audio. Note: Both units must be used together; they are not functional as standalone devices. 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/floors (floors 1–8) Operating Frequency: 462 MHz (B-band), 434 MHz (A-band) Working Time: Approximately one week per full charge Charging Time: Approximately 5 hours Standby Time: 3–5 days Volume Adjustment: Three-level adjustment for ringtone and call volume Ringtones: 38 options Ring Volume: Three-level adjustment Call Volume: Three-level adjustment 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 must be used together; individual use is not supported. Due to variations in screen settings and lighting conditions, actual product color may differ slightly from images. Package Includes: 2 × Indoor Intercom Units 2 × Charging Docks 1 × 2.0 mm Screwdriver 1 × Charging Station Cable 1 × Host Charging Cable 1 × Instruction Manual 1 × Strong Adhesive Pad