1. LED Power:4pcs CR2016 Cell Button. 2. 3 Light Modes:Continuous on,Slow flashing,Fast flashing(with switch to select) 3. Material:nylon 4. Size：XS/S/M/L/XL
XS width 1.5cm telescopic range 32-39cm (the battery case is silicone battery is CR2016*4) -- Bust: S 32-40cm -- Bust: M 38-50cm -- Bust: L 43-60cm -- Bust: XL 50-67cm
