Q: What is the maximum underwater depth this phone case can withstand?
A: This TELESIN underwater diving phone case adopts the IP68 professional waterproof standard, which can withstand a maximum underwater depth of 20 meters (66 feet), making it suitable for scuba diving, snorkeling, swimming and other common water activities, providing reliable waterproof protection for your smartphone.

Q: Will this case fit my smartphone?
A: The case is designed to fit 99% of straight-screen smartphones with a screen size between 5.4" and 6.9", including the latest iPhone 14/15/16 series and Android models such as Samsung Galaxy S23/S24 and Google Pixel 8. It is not compatible with curved-screen phones, thick phone cases or popsocket accessories; thin phone cases do not need to be removed.

Q: How do I ensure the case is completely leak-proof before diving?
A: Before each use, please use the included vacuum pump to conduct an airtightness test. After pumping air out of the case, check if the pump remains firm—if it does, the case is tightly sealed and leak-proof. We also recommend a simple water-immersion test (soaking in a basin of water for 10-15 minutes) before first use to confirm there is no water leakage.

Q: Can I operate my phone’s camera normally underwater with this case?
A: Yes. The case is equipped with an integrated 5-button control system (Shutter, Zoom W/T, Mode), allowing you to adjust zoom, switch shooting modes and control photo/video capture with one hand, without touching the phone screen. The Bluetooth connection is stable even underwater, enabling remote camera control.

Q: How do I connect the case to my phone via Bluetooth?
A: First, press and hold the shutter button on the case for 2 seconds to power it on. Then, open your phone’s Bluetooth settings, search for the device named "TELESIN_SDC", and select it to complete pairing. If the connection is not established within 2 minutes, the case will automatically turn off to save power.

Q: How to maintain the case to extend its service life?
A: After use in saltwater, soak the case in fresh water for 10 minutes, then rinse it under tap water to remove salt and debris. Dry the case thoroughly with a soft cloth (included in the package) before storage. Avoid using harsh chemicals (such as bleach or alcohol) and store it in a cool, dry place away from high temperatures and direct sunlight.

Q: Does the case affect the quality of underwater photos and videos?
A: No. The case is equipped with a high-light-transmission lens with 97% light transmittance, which ensures clear, sharp and true-to-color photos and videos underwater. The built-in anti-fog design also prevents blurred shots caused by humidity or low temperatures, capturing every detail of the underwater world.

Q: Is there a warranty for this product, and what does it cover?
A: Yes, this product comes with a 12-month warranty from the date of purchase. The warranty covers quality issues such as water leakage (non-human damage), button failure, and Bluetooth connection abnormalities. If you encounter such problems, you can contact our after-sales team for replacement or repair.

Q: Can I use the case for long periods of time underwater?
A: The case is designed for long-term underwater use within the 20-meter depth limit. It is made of high-quality ABS, PC and aluminum alloy materials, which are durable and can withstand the harsh underwater environment. However, we recommend avoiding prolonged immersion in high-pressure deep water to further extend the seal's service life.

Q: What should I do if the Bluetooth connection fails during use?
A: If the Bluetooth connection fails, please first restart the Bluetooth function of both the case and your phone. Then, re-power on the case (press and hold the shutter button for 2 seconds) and re-pair. If the problem persists, check if the case is fully charged and ensure there is no strong signal interference underwater.