Philips PSE4000, 70 dB, 200 - 12000 Hz, 200 mW, 3 cm, Lithium Polymer (LiPo), 100 h Philips PSE4000. Signal-to-Noise Ratio (SNR): 70 dB, Frequency range: 200 - 12000 Hz. Output power: 200 mW, Loudspeaker diameter: 3 cm. Battery technology: Lithium Polymer (LiPo), Battery life (max): 100 h, Recording battery life: 24 h. Weight: 276 g, Width: 45 mm, Depth: 175 mm