AKG WMS40 Mini2 Vocal Set BD US25A/C - Wireless Microphone Set. This wireless microphone system is the latest and simplest solution for wireless transmission. AKG consistently introduces reliable and efficient solutions to the market. Its latest offering, the WMS40 MINI Set Dual, continues its line of excellent wireless systems and is an excellent solution for public institutions, schools, community centers, clubs, and conference rooms. HDAP (High Definition Audio Performance) technology ensures realistic sound. The SR 40 Mini2 receiver features LED indicators for each channel, indicating status, received signal strength, and possible overload. Each receiver is sold with a universal 12V power supply. The durable HT 40 handheld transmitter features an on/off/mute switch and a sturdy wire mesh head that protects the internal components of the dynamic, cardioid microphone. A single AA battery lasts 30 hours, the same as the legendary WMS 40. This reduces the need for new batteries and saves money in the long run. SPECIFICATIONS: Two dynamic, cardioid microphones with built-in HT40 transmitters. SR 40 Mini2 receiver with dual antenna system to eliminate interference. 12V AC adapter.