X88 Keychain Voice Recorder 32GB Noise ReductionProduct material :Metal BodyStandby time :30 daysBattery capacity :300mAhCharging time :1-2 HourRecording format :WAVMemory capacity :32GB Build In BatteryRecording time: 22-24 hoursTransmission interface: USB 2.0Number of microphones: twoRecording dis..