Operation voltagevdc72v modeluv 5r 4th battery capacity2800mah whats in the boxearphone charger adapter battery clip cord antenna walkie talkie operate temperature 20c 50c walkie talkie typedigital handheld accessories typeearphone charger adapter battery clip cord antenna maximum range15km 3km frequency range136 174mhz 400 520mhz channel capacity128 output power w51 functionctcsscdcss lcd display dual standby dual display dual band voice prompt fm radio