Active 3d glasses usability 3d tvs suitable for adults children suitable for spectacle wearers 3d technology active shutter lens type liquid crystal shutter colour black battery type button cell battery cr2025 operating time 100 h transmission mode bluetooth function foldable arms included in delivery 3d glasses dimensions 147 x 46 x 170 mm weight 36 g material plastic shapes of glasses square trapezoidal frame type full frame manufacturer spe