Philips SBCHL145. Ear coupling: circumaural, Headphone frequency: 18 - 20000 Hz, Headphone sensitivity: 96 dB. Connectivity technology: Wired, Cable length: 1.2 m. Gross weight inner carton: 1.29 kg, Height inner carton: 250 mm, Length inner carton: 358 mm. Gross weight outer carton: 1.4047 kg, Height outer carton: 248 mm, Length outer carton: 345 mm