1. Output : 10 inch 2 channel built-in speaker : OUT1+OUT2; when OUT1 insert, parallel connected with the build-in speaker, OUT2 insert, cut with the built-in speaker. (1)AUX OUT * 1. (2)LINE OUT * 1. 2. Input : (1)wireless MIC * 2. (2)CD player * 1. (3)TAPE * 1. (4)AUX IN * 1. (5)LINE IN * 1. (6)with two group of BAL and UNBAL Dual purpose wire microphone. 3. FUNCTION : (1)The Portable Amplifier with multi-module and completed functions. (2)Made of high quality aluminum material, portable and well carry-home. (3)With simple sculpt, line type flute design. (4)Microphone with bass and treble, echo, repeat and delay functions. (5)With power switch, convenient for several amplifiers in series. (6)Build inside one group 24V/4.2AH battery, can be used when power failure. (7)Built-in high quality digital echo circuit and actuator, can make Singing/Speaking voice more beautiful. (8)Built-in priority power switch, after start, all microphones have priority speak function. (9)Microphone with Sing/Speak power switch, is suitable for different occasions. (10)With intellective battery charge management function, can check battery, if in low it can cut automatically to prevent over discharging. (11)With flex pole, handle, wheel and triangle rack fixed point, convenient for moving and installing. 4. Frequency Response : 40Hz ~ 20KHz. 5. Rated Power Output : AC220V/100W DC 60W. 6. Power Source : AC220V DC24V(OUT,IN). 7. Dimensions : 363W* 287D* 530H(mm). 8. Weight : 19.5Kg.