Samsung SCH-A990ZKAVZW - Manual (Page 18)

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Section 2
2. Play/Pause Key: Music play or pause toggle key.
3. Speaker: Music, Ringtones, and Sounds are played
through the speaker.
4. Fast Forward Key: Music fast forward key.
5. Headset/Audio Video Jack: Allows you to plug in an
optional headset for safe, convenient, hands-free
conversations.
6. microSD™ Memory Card Slot: This expansion slot
allows you to insert a microSD™ memory card to for
additional memory and storage capacity.
7. External Display: External display shows signal and
battery strength, alarm, time, day, and date. It also
displays incoming calls or messages.
Closed View
1. Speaker: Music, Ringtones, and Sounds are played