Two-in-one-out mixing board Input/output interface: 3.5mm; The supply voltage is between DC5V-24V, and the static working current is about 85ma; Operating frequency range: 20HZ-20KHZ Amplification gain: 12db Input impedance: 10K; Output impedance: 16 ohms-600 ohms; Output power: 600 ohms /22mw*2,32 ohms /370mw*2,16 ohms /450mw*2; PCB size: 55X50mm;