Revolabs - 01ELITEMICOM - Revolabs Executive Elite Microphone - 100 Hz to 20 kHz - Wireless - Desktop Part Number: 01-ELITEMIC-OM Type: Microphone Specification: Polar Pattern: Omnidirectional LED Indicators: 4 x Mute and Power Batteries: 2 AA Rechargeable Frequency Response: 100 Hz - 20 kHz Radio Frequency: North and South America: 1920 to 1930 MHz Range: 300' (90 m) line-of-sight Encryption: 256-bit key (AES) Signal to Noise Ratio: 70 dB @ 1 kHz 94 dB SPL Charge Time: 6 hours Talk Time: 20 hours Standby Time: 72 hours Dimension: 1.10 x 3.10 x 3.10 (H x W x D) Weight: 47.0 oz.