AudioSystem: MiniDisc digital audio systemLaser: Semiconductor laser (=780 nm)Sampling frequency: 44.1 kHzCoding: Adaptive Transform Acoustic Coding(ATRAC)No. of channels: 2 (left and right, stereo)1 (monaural)Frequency response: 20 Hz-20 kHz (+0 dB, -6dB)Wow and flutter: Below measurable limitGeneralInput terminalOPT/LINE IN jackImpedance: 47kInput level: SENS H: 178mVSENS L: 500mVMIC jackImpedance: 600Input level: 0.4mVOutput terminalOutput Jack: Phones, 22Power output: 3.5 mW+3.5 mWPower supplyRechargeable battery: DC 1.2V(included rechargeable battery)Battery: DC 1.5V (One LR6, AA, UM-3 battery)AC adaptor: DC 1.8V (included AC adaptor)Dimensions (WxHxD)Cabinet dimensions: 78.2x71.6x16.8mmincl.projecting parts: 79.9x73.6x18.6mmWeight: 120 g (withbattery)94 g (without battery)Play time(When used in hold mode, at 25°C, on a flat, stable surface)Battery type: Play time Record timeRechargeable: About 15 hours About 7 hoursPanasonic alkaline: About 21 hours About 3 hoursBoth together: About 38 hours About 15 hoursChargerInput: AC 220 V (GH) / AC220-230 V (EG) /AC 230-240V (EB), 50/60 Hz 8WRecharging time: About 3 hours2