Feature: 1. HUMIDITY RANGE: Electronic hygroscopic card working range humidity is maintained between 25%‑55% (see the humidity meter on the box), if the humidity meter is higher than 60%, you need to take out the electronic hygroscopic card for charging. 2. LARGE SIZE, LEAKAGE GUARD: The electronic hygroscopic card measures Approx. 138x98x33mm / 5.43x3.86x1.30in, which is really a large size hygroscopic card. With leakage guard device, it can effectively prevent leakage of electricity, safer to use. 3. SUPERIOR PERFORMANCE: Electronic hygroscopic card adopts high efficient special hygroscopic material, hygroscopic and regenerative combination, hidden power push plug design, space saving, no loss. Wet absorption without plugging, no thermal effect. 4. WIDELY USE: Electronic hygroscopic box is widely used for storing cameras, camcorders, computer diskettes, sound visual products, stamps, photographs, fine instruments, sealed cabinets (or containers) in the wet proof. 5. PREMIUM MATERIAL: Made of ABS material, sturdy and lasting, breathable holes bit can effectively dissipate heat. Repeated use, safety and power saving, eco friendly and no pollution. According to different items wet absorption time is different, not a generalization, the average charging wet absorption time up to 2‑3 weeks. Specification: Item Type: Electronic Regeneration Hygroscopic Card Material: ABS Size: Approx. 138x98x33mm / 5.43x3.86x1.30in Frequency: 50HZ Power: 16W . Package List: 1 x Electronic Regeneration Hygroscopic Card Note: Manual measurement please allow some error.