fastforward at 15x

When watching a DVD, my dvd players allows me to fastforward or rewind at a speed of anywhere between 15x and 300x

Could you tell me if I've naturally written the 2 sentences?

1 When watching a DVD, my DVD players allows me to fastforward or rewind at a speed anywhere between 15x and 300x.

2 The slowest fastforward is 15x. The fastest fastforward is 300x.

Thanks