The DTR410 digital on-site two-way radio presents a better way for small businesses to communicate. It also offers enhanced performance with wide coverage, longer battery life and clear, crisp audio. Digital one-to-many calling networks with other DTR radios on the same group ID and channel, for enhanced compatibility. Digital One-to-Many Group Call Allows other DTR radios on same group ID and channel to communicate. Lithium-Ion Battery Gives extra-long battery lifeup to 14.5 hours of operation per full charge. Rugged, Compact Polycarbonate Housing Offers comfort, with rubber over-mold. Durable Design Meets military 810 C, D, E, and F specifications for shock, vibration, water, dust and temperature extremes. Full-Graphic Backlit Display Uses contrast adjustment and back-light timer and provides battery gauge. Caller ID Stores recent call listup to last 20 transmissions. Unit-to-Unit Configuration Simplifies cloning operation, with via optional cable.