Shure BLX288/PG58 Wireless Vocal Combo with PG58 Handheld Microphones, H8 Included: BLX88 dual wireless receiver; 2 BLX2/PG58 handheld transmitters with integrated PG58 cardioid dynamic microphone capsules; 2 microphone clip Power and battery status LED Adjustable gain control Quick & easy frequency matching 2 AA batteries (included) provide up to 14 hours of continuous use 300 feet (91 m) operating range (line of sight) Up to 12 compatible systems per frequency band (region dependent), plus One-touch QuickScan frequency selection quickly locates the best frequency. XLR and &#034; output connectors. Two-color audio status indicator LED (Green: Normal audio levels / Red:Excessive audio levels).