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- High-density foam Flow Heads™ should be replaced every three months or if they show obvious signs of wear and tear or become dirty.
- Fully charge battery before first use.
- Recharge device monthly to extend battery life.
- Device can be recharged at any time and at any battery level.
- Only recharge using the supplied Flow USB charger cable.
- Do not keep/leave/store batteries in direct sunlight or at temperatures above 40°C.
- The battery and charger work best at normal room temperature. Do not charge in direct sunlight or cold temperatures. The temperature range for charging is 0°C to 40°C.
- Never leave your device operating or charging unattended.
- It is not recommended to fully deplete the battery.