... Talk function9. 16 pieces of chord ringtones optional and volume adjustable 10. Upgrade technology, very clear image and audio ... Monitor State, Lock/Unlock, Talk, Take a Picture, Increase Volume, Decrease Volume, View Last Picture, View Next Picture, Signal Bar, Battery ... Talk Button, MIC, LED Indicator, Mini USB Input, Speaker, Volume -/+, Brightness control -/+, Antenna, Power ON/OFF Switch , Work ...