Philips SpeechOne Wireless Dictation Headset. Signal-to-Noise Ratio (SNR): 70 dB, Frequency range: 150 - 15000 Hz. Output power: 200 mW, Loudspeaker diameter: 2.3 cm. Battery technology: Lithium Polymer (LiPo), Recording battery life: 12 h, Battery capacity: 360 mAh. Weight: 81 g, Width: 155 mm, Depth: 150 mm. Cables included: USB |