PYLE-HOME PPCM20 Wireless Headset/Headphone With Base Station and USB Transmitter for PC/Mac For Video Chat Advanced Wireless And Digital Technologies Provides Stereo Hi-Fidelity Without Wires - Mini USB Transmitter - Reception Range: 10m 360 Degree - Distortion: &lt;0.1% PC With USB Audio Streaming Capability Through USB Port - Active Noise Reduction Function - Transmit Power: 4dbm - Working Power: 3.5-4.2V Microphone Function Via USB - Rechargeable Batteries Built-In To Headset - Frequency Range: 2.4G - 2.48ghz - Speaker Size: 30mm