Svbony SV172 dew heater strip designed with PWM Function, which can provide more accurate, energy-saving, efficient heating control, thus enhancing the performance and reliability of telescope equipments. 

Tips: This dew heater is suitable for SV503 80ED, SV503 102 ED, SV550 80 APO, SV550 122 APO

Svbony SV172 dew heater strip designed for astronomy telescopes and cameras, protecting optical devices like telescopes and cameras from fogging or freezing.

4 removable Velcro internal padded divider that can store your high-value telescope accessories.

Double padding layers internally to prevent damage to telescope equipment and eyepieces and so on. An internal padded divider makes sure these astronomical accessories are never scratching each other.

This carrying case features a removable shoulder strap and hand-carry strap, so you can easily take your telescope anywhere.

Installed with unbreakable metal D-rings that are tightly connected to the bag using double stitched straps.

PVC coated heavy duty bottom is used to protect the bag from rough surfaces

1. Measure the circumference of the telescope tube or camera lens (or measure the tube diameter - not the scope aperture - ×3.14).

2. The heating element provides even heat distribution.

3. The power-efficient design will not result in an extra drain on your power supply.

4. SV192 prevents dew condensation from forming on the glass surface.