... mp3/mp4,support TF,built-in2G-8G storage,built-in battery,built-in speaker mini mobile projector Description Resolution of ... ,PSP and other multimedia devicesBuilt-in removable high-capacity lithium-ion battery, support longtime mobile use(up to 120 minutes)Support ... : Rockchips RK2706Audio interface: 3.5mm audio output interfacePower source: lithium-ion rechargeable batteryAdaptor:5V, 2A weight:117g