AKG K240 MKII Studio Recording Headphones+Rechargeable Headphone Amplifier

Package Includes: (1) AKG K240 MKII Pro Studio Headphones Audiophile Sound Quality K 240 MK II. (1) Rockville HeadRock Battery Powered Rechargeable Personal Headphone Amplifier Amp. Whats In The Box: (1) K240 MKII Headphones. (1) EK300 Cable. (1) EK500 Coiled Cable. (2) Velvet Ear Pads. (2) Leatherette Ear Pads. Features: Headphone type: Semi-open. Max. input power: 200 mW Audio frequency bandwidth: 15 25000 Hz. Sensitivity: 104 dB SPL/V. Rated impedance: 55 Ohms. Detachable cable: Yes. Cable length: 3 m. Plug type: Stereo 3.5 mm (1/8) with 6.3 mm (1/4) screw-on adapter. Connection type: Mini XLR. Connection gender: Male. Connection contacts: 3-pin. Connection interface finish: Gold. Replaceable earpads: Yes. Wearing style: Over-ear. Cup style: Semi-open Foldable: No. Dimensions (L x W x H): 110 x 190 x 200 mm (4.33 x 7.48 x 7.87 in). Net weight: 240 g (8.47 oz). Includes: (1) x headphone amp. (1) x Micro USB cable. (1) 3.5mm male to male audio jack cable. Manual and warranty card. Features: Rockville HeadRock Battery Powered Rechargeable Personal Headphone Amplifier. 3.5MM headphone output. 3.5MM aux input for music player Lithium Battery with 800mAh capacity. Rechargable battery lasts 5-8 hours per charge. Headphone Amplifier Works with 16 300 Ohm Impedance. Headphone output power: 65mW@16O 89mW@32O 95mW@64O 69mW@120O 29mW@300O. High/Low gain switch. Volume control. 300mv - 2000mv. Strong aluminum case ensures long life and strong heat dissipation. Chipset: NE5532. THD: 0.0001%. Signal to Noise Ratio: 125dB Frequency Response: odB (20Hz-20kHz). AMP Internal Voltage: 8V / 500mA. DC power Charging: 5V 1A. Weight: 0.17 lbs. Dimension (inches): 3.74 x 2.09 x 0.5 ( L X W X H)