... , display control, to ensure the best sound quality.In portable system, fever grade materials are applied: Kemet tantalum capacitors, ... increase the low frequency and transient explosive power of portable system.Lithium polymer batteries applied in the aircraft models ... charging charge status.Dimension: 135mm * 78mm * 27mm (excluding the output socket, switch, button, etc.) 150mm * 78mm * 30mm (with all ...