They come in a variety of sizes and styles; some are small and portable with handheld cameras, while others are much larger and mounted on a fixed stand.
ðeɪ kˈʌm ɪn ɐ vɚɹˈaɪəɾi ʌv sˈaɪzᵻz ænd stˈaɪlz; sˌʌm ɑːɹ smˈɔːl ænd pˈoːɹɾəbəl wɪð hˈændhɛld kˈæmɹəz, wˌaɪl ˈʌðɚz ɑːɹ mˈʌtʃ lˈɑːɹdʒɚ ænd mˈaʊntᵻd ˌɔn ɐ fˈɪkst stˈænd.