Features One-piece molded cabinet with high efficiency amplifier system to drive a full-range speaker for powerful and clear sound. Retractable handle and rugged wheels make it amazingly easy to transport. It can be hand-carried or installed on a tripod stand. Built-in transmitters' storage. Modularized optional accessories for fast and easy installation and replacement. Control for high / low TONE adjustment. Mixed input amplification of wired mic, wireless mic, and audio players. Extension speaker socket can be used with MA-707EXP passive speaker. Industry’s first built-in active dual antennas for long distance and stable receiving. Built-in AC switching power supply and rechargeable batteries. Specifications Name: Classic Portable PA Max. SPL: 107 dB Drivers: 8 full-range Frequency Range: 70 Hz – 14 kHz Audio Inputs: MIC IN: 1 × XLR, 1 × 1/4 (6.3 mm) LINE IN: 1 × 1/4 (6.3 mm) Audio Output LINE OUT: 1 × 1/4 (6.3 mm) Amplifier Class: AB Output Power: 100 W RMS, 170 W peak Receiver Modules: Up to 2 Audio Players: CD/USB player (optional) Transmitter Modules: N/A Extension Speaker: 1 × 1/4 (6.3 mm) Other Functions: TONE control Power Supply: AC 100 – 240 V or DC 24 – 32 V Battery Built-in: Lead-acid battery Battery Indicator: Single LED Indicator Standby Time: Up to 8 hours