The F3161 / F4161 series meets IP55 requirements for dust-protection and water jet resistance. Its durable construction is backed up by the aluminum die-cast chassis and polycarbonate casing, allowing reliable operation under harsh weather and environmental conditions. These radios can work on both LTR (Trunking) and Conventional modes. Group selective and phone call are available in LTR mode. The radio comes standard with a High Capacity Lithium-Ion battery that will give you up to 14 hours of operating time.