Darcy. Its 25MM (huge compared to the one on my camera) and can pick up a wide range of frequencies. Have a little arthritis in knees and, rather than bending over to tie shoelaces or trying to get my foot up on my knee to tie them, these are easily stepped into. While she can undo the Velcro, she cant take the shoe off. (2) Some of the parts dont have elastic strap spots, and are just free floating and banging around in the bag. bien para los niños I bought these based on reviews and because I wanted to try something new. Everything was well-labelled. Depending on shoe brand, I?ve worn a size 7. Reliable and long lasting.