The pump is specially designed for increasing oxygen levels in your fish tank or bait bucket, helping to keep your bait and catch alive and healthy. With its compact and lightweight design, it is easy to transport and store. And with its dual-use USB connectivity, you can charge it from a power bank, laptop, or any USB-enabled device. Super-quiet motor for silent operation Lithium-ion rechargeable battery for long-lasting use Compact and lightweight design for easy portability Dual-use USB connectivity for charging on the go Helps increase oxygen levels in fish tank or bait bucket for healthier bait and catch Color: white Specifications: 1: lithium battery single hole: Weight:278g Power:1W Gas volume:3L or Min Battery capacity: 1800MAH Suitable for fish tank: 40cm or less Intermittent time: 48 hours Continuous working time is up to 24 hours. Intermittent working time up to 48 hours Work 8 seconds and stop 10 seconds 2: Lithium battery double hole Weight:388g Power:2W Air volume:2x3L or Min Battery capacity: 2600MAH Suitable for fish tank: 60cm or less Intermittent time: 48 hours Continuous working time up to 24 hours, the intermittent working time z up to 48 hours Work 8 seconds and stop 10 seconds Package includes: 1pcxoxygenation pump Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.