Item Type: 2 Way Voice Intercom Material: ABS Model: H8 Battery: Rechargeable Lithium Battery 3.7V 2000mAh (Built in) Use: Widely used in household, office, laboratory environment, medical treatment, etc. Basic Parameter: Working Temperature: -20℃ to 55℃ Transmission Distance: 1000m in open area, 20 to 50m through wall Operating Frequency: 410M to 490M Clear and Reliable Communication – The 2-way voice intercom offers clear, two-way audio communication, making it ideal for use in households, offices, medical environments, and laboratories. Stay connected in any setting with ease. Long Transmission Range – With a transmission distance of up to 1000 meters in an open area and 20-50 meters through walls, this intercom ensures reliable communication over long distances, even in challenging environments. Rechargeable Lithium Battery – Powered by a built-in 2000mAh rechargeable lithium battery, the intercom provides extended use and convenience. No need for constant battery replacements – simply charge and go. Wide Temperature Range – Designed to function in a working temperature range of -20℃ to 55℃, this intercom is built to withstand extreme environments, ensuring dependable performance in a variety of conditions. Compact and Durable Design – Made from high-quality ABS material, this intercom is durable and lightweight, making it easy to carry or mount in different locations. It’s perfect for both indoor and outdoor use, providing seamless communication at home or in professional settings.