798SpecificationsFor the Digital Voice RecorderRecording format:WMA (Windows Media Audio)Input level:ā70 dBvSampling frequency:ST XQ mode: 44.1 kHzST HQ mode: 44.1 kHzST SP mode: 44.1 kHzHQ mode: 44.1 kHzSP mode: 22 kHzLP mode: 8 kHzOverall frequency response:ST XQ mode: 50 Hz to 19 kHzST HQ mode: 50 Hz to 15 kHzST SP mode: 50 Hz to 9 kHzHQ mode: 50 Hz to 13 kHzSP mode: 100 Hz to 7 kHzLP mode: 100 Hz to 3 kHzRecording time:(WS-331M)ST XQ mode: 35 hours 30 minutesST HQ mode: 71 hours 00 minutesST SP mode: 142 hours 05 minutesHQ mode: 142 hours 05 minutesSP mode: 279 hours 35 minutesLP mode: 555 hours 45 minutes(WS-321M)ST XQ mode: 17 hours 40 minutesST HQ mode: 35 hours 25 minutesST SP mode: 70 hours 55 minutesHQ mode: 70 hours 55 minutesSP mode: 139 hours 40 minutesLP mode: 277 hours 35 minutesSpecifications(WS-311M)ST XQ mode: 8 hours 45 minutesST HQ mode: 17 hours 40 minutesST SP mode: 35 hours 25 minutesHQ mode: 35 hours 25 minutesSP mode: 69 hours 40 minutesLP mode: 138 hours 30 minutesAlkaline battery life:(Recording)ST XQ mode: Approx. 11.5 hoursST HQ mode: Approx. 13.5 hoursST SP mode: Approx. 14.5 hoursHQ mode: Approx. 16 hoursSP mode: Approx. 16.5 hoursLP mode: Approx. 21 hours(Playback/ All Mode)Speaker playback: Approx. 7 hoursEarphone playback: Approx. 15 hoursNi-MH rechargeable battery life:(Recording)ST XQ mode: Approx. 9.5 hoursST HQ mode: Approx. 11.5 hoursST SP mode: Approx. 12 hoursHQ mode: Approx. 12.5 hoursSP mode: Approx. 12.5 hoursLP mode: Approx. 15 hours(Playback/ All Mode)Speaker playback: Approx. 6 hoursEarphone playback: Approx. 11.5 hours