... )Software upgrading via USB port or OTAKeys: Power, CH+, CH-4-digit LED indicator (optional)Specifications:TUNER: RF input connector: ... PANEL IR Receiver: 38 KHz2 LED indicators: Power, REC4-digit LED indicator (optional)Keys: Power, CH+, CH-USB2.0 slot RCUCategory: ... 5V AAA ACCESSORIES: Remote control / User manual / Battery POWER SUPPLY Input voltage: AC90~250V, 50/60HzPower consumption: <20WStandby ...