What is it? A pair of “ultra light, ultra compact” portable wireless PA systems designed for indoor/outdoor applications. Details With its rechargeable lithium battery, the MA-100 weighs only 1.8kg but delivers 50W output from its built-in class-D amplifier. It can accommodate up to two built-in wireless diversity receivers with 16 preset auto-scannable frequencies and an optional USB player/recorder with LCD screen. Four configurations are available in terms of number of wireless receivers and optional USB player/recorder and the rear panel line input accepts external iPod, MP3 or CD player. The design also includes a built-in alarm button for emergency situations plus a 4-LED battery indicator to monitor charging and current battery status. A shoulder carry strap is included as well a molded fixed handle and integrated mic adapter for easy transport. The MA-303 is a standup version with the same features as the MA-100, but housed in a larger enclosure with two-way speakers and capable of 60W power output. And another thing… The built-in lithium battery is capable of providing between 12 and 16 hours of stand-by time per charge.