Panasonic RQSW88V Shockwave Personal Stereo ShockWave metal design (durable aluminum body, side rubber protector and twist lock system) 1 battery operation system provides long playback (up to 28 hours with 1 AA alkaline battery) 3-key remote control with detachable headphones Full-logic auto reverse playback plays both sides of the tape automatically Digital synthesizer tuner for fast accurate tuning