Color Black Brand HONGDAK Model 2S Material Electronic components + plastic Quantity 1 Piece Compatible Brand Sony Compatible Models Sony A580 / A560 / A55 / A33 / A390 / A290 / nex-5 camera Sony A550 / c A450 / A500 featured/A700 / A900 / A330 / A230 not suitable for NEX-3 a100/a200/a350/a750/a850" Effective Distance 5-10 m Wired/Wireless Wireless Battery Model OthersCR2025 Battery included or not Yes Remote Controller Battery Number 1 Other Features Support the "instant" and "2 seconds delay" two kinds of shooting patterns Packing List 1 x Remote controller (built-in 1 x CR2025 battery)