... equipment play tracks independent memory, mutual No interference.5, Built-in radio function, can be automatically accept ... search channel, channel range is 87.5-108 MHZ.6, With the switch key and ... switch.7, 2.0 track stereo.8, Nokia BL - 5 c battery, rechargeable type.9, Full electric battery ... continuous use 8-12 hours.10, Support 3.5 mm outside sound input interface.11, Can be ...