Single Unit Base, Product Type Single Unit Base, Compatible Radio Type Handheld, Compatible Radio Brand Icom, Compatible Radio Series M37, M37E, Compatible Radio Manufacturer Model Number IC-M37, Compatible Radio Grainger Model Number 55EE26, Number of Radios Charged 1, Number of Batteries Charged 1, Voltage 5 V DC, Minimum Recharge Time 1 hr, Maximum Recharge Time 2 hr, Number of Chargers Included 1, Features Quick Charging, Supports Micro-B USB Input, Overall Height 3 in, Material ABS Plastic