Recharging Echo Treble Bass 2.4G Wireless Handheld Microphone for Karaoke

Recharging  Echo Treble Bass 2.4G Wireless Microphone for Karaoke Microphone handheld Antenna Program:                         Built-in Transmission power:                     10MW Spurious suppression:                  -60dB Power supply:                                 DC 5V( recharging) Core Direction:                              Heart-shaped Pickup:                                            Dynamic Microphone working w:     100mA Use distance:                                  30-50 meters (under  standard conditions) Operating temperature range:    -30°C-+60°C Frequency stability:                      within ±0.005% Maximum frequency deviation:  ±45KHz Battery application time:             3-8 hours (standard  universal battery) Operating frequency range:        UHF800-899MHz Microphone handheld/Fanny pack collar clip :(optional) Operating frequency range: 2.4G Antenna program: built - inTransmission power: 10MW Stray suppression: -60db Mi core directivity: heart type direction Pickup: moving coil Power supply: built-in battery Microphone operating current: 100mA Operating temperature range: - 30 °C - + 60 °C Frequency stability: within + / - 0.005% Maximum frequency deviation: + / - 45KHz Battery life: 8 hours Charging time: 3-4 hours Charging mode: USB charging 5V