Opened, but unused. ▲▽▲▽▲▽▲▽▲▽▲▽ Operating Distance: Approximately 7m (Varies depending on the equipment and room conditions) Power Supply: DC3V, AAA batteries x 2 (sold separately) Battery Life: Approximately 1 year (using new alkaline batteries) * Varies depending on usage frequency External Dimensions: Width 50 x Height 210 x Depth 28.5mm, Weight: Approximately 97g (excluding batteries) Type: Single item Wide transmission range (has 2 signal transmission points)