*****Small and convenient size; it easily fits on your hand; it measures 4.3 inches in height without antenna(antenna length: 5.24 inches); 1 inch thick; 2 inches in width; 5.5 oz light-weighted; solid built; water-resistant; easy to operate for all ages; 2 Wattage power output; each radio has a removable belt clip *****Frequency range is UHF 400-470MHz; 16 pre-programmed channels; each radio has identical frequency on each of the 16 channels out of the box; 16 position mechanical rotary switch channel selector; when you turn the knob to change the channel, a synthesized voice will tell you the channel number; channel frequency is programmable within the frequency range; you can program any of 50 CTCSS tones and 105 CDCSS tones on each programmed channel *****Each radio comes with a 1500mAh rechargeable Li-ion battery and a charging dock; the charger comes with an AC wall-wart Type A plug and works in 110v-240v; it takes about 2.5 hours to fully charge; battery life is determined by transmit time; it