WIRELESS SYSTEM: HAND-HELD Domestic UHF wireless system. Perfect for home karaoke, teachers, conferences, etc. Composed of a handheld microphone transmitter and receiver with a ¼ jack output. Range 40 / 50m. Receiver battery life: approximately 4h. Frequency range 863-865 Mhz. The hand-held transmitter works with two 1.5V AA batteries. The receiver is charged with any phone charger through a 5V mini USB port.