Motorola MT-777 Handheld Wireless For construction sites and its users in the desert and on trips, it achieves a high range in open areas, 5 watts, and 128 channels Number of channels: 23 channels expandable up to 128 channels Communication range: Up to 3 kilometers in the open air Power: 5 watts Battery: Rechargeable 1300 mAh lithium-ion battery Additional Features: LCD screen Keypad lock function Battery charge indicator Shock-resistant housing