Sending a message with smartphone - Drawing on chalkboard

hand internet smartphone wireless icon computer mobile phone online illustration smart cell wifi sign symbol chalkboard technology background white drawn network vector web wi-fi holding cellphone cellular touch display screen empty touchscreen message isolated telephone flat sms contact call business blank hold showing blackboard device finger gadget digital black object tablet chalk app graphic drawing design sketch press electronic draw application click communication suit profile pad teacher study write classroom portable class abstract modern learn text student person school teach education work board office businessman speech bubble virtual info information green software closeup communications computers concept creative equipment global human idea media medium mobility monitor pc push social touchpad center centre communicator in presentation review show simple us with zone on fi hotspot area free wi public connect radar access spot signal gps satellite map maps location finder finding found lost system marker locate control ituran