【2 Extension Tubes】Combined of 2 different metal extension tubes, including 12mm + 24mm, the automatic extension tubes can be used separately(12mm/24mm) or in combination(12mm+24mm) for different focal length. | 【Electric Pins】Built-in electric pins, superior lock pin which can tighten the tube joint, to make photographic activities at closer distance with higher magnification, to achieve macro effect with excellent photo quality. | 【Multifunctional】Support camera TTL, autofocus function and EXIF information transmission, only shooting according to actual photometric conditions, which is really convenient for user. | 【Lightweight】High quality and compact machining, net weight only 151g/ 5.32oz which is super lightweight and portable. | 【Durable】These extension tubes offer lightweight durability, with metal mounts that provide additional robustness that will stand up to switching between lenses and other tubes for long-lasting use.

The clapboard is designed for film, TV series, studio live, advertising, video recording, etc. | Dimension: 30 * 24cm/ 12 * 9in, the size of writing area: 30 * 19cm/ 12 * 7.5in. | The writing area is blank, has no any printing letters, which allow DIY freely. | High-quality acrylic material, easy to write and clean, durable to use. | Wooden clapper sticks have built-in magnet for stable and audible closure.