<p>Maximum frequency deviation:+ \/ - 45KHz</p> <p>Battery life:8 hours</p> <p>Charging time:3-4 hours</p> <p>Charging mode:USB charging 5V</p> <p>Type:Recharging Treble Bass 2.4G Wireless Microphone for Karaoke</p> <p>Antenna Program:Built-in</p> <p>Transmission power:10MW</p> <p>Spurious suppression:-60dB</p> <p>Power supply:DC 5V(recharging)</p> <p>Core Direction:Heart-shaped</p> <p>Pickup:Dynamic</p> <p>Microphone working flow:100mA</p> <p>Use distance:30-50 meters (under standard conditions)</p> <p>Operating temperature range:-30C-+60C</p> <p>Frequency stability:within 0.005%</p> <p>Maximum frequency deviation:45KHz</p> <p>Battery application time:3-8 hours (standard universal battery)</p> <p>Operating frequency range:UHF800-899MHz</p> <p>Colour:Black</p> <p>Material:Plastic</p> <p>Package Contents:</p> <p>2 * </p> <p>1 * Receiver</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>