I used this once but no longer need it, so I'm selling it. [Penlight] Knight X - Knight X - Penlight [Size] Total length: 24.5cm (approx.) [Materials] Light-emitting part: PETG resin Grip/Plastic parts: ABS resin Strap: Polyester, ABS resin [Light Colors] 4 colors total (1. RED → 2. LIGHT PINK → 3. LIGHT GREEN → 4. WHITE → 5. All colors on) * You can switch the light color with the left and right buttons. [Batteries] AAA batteries x 3 * Rechargeable nickel-hydrogen batteries can also be used, but the original brightness and light emission time may not be fully achieved.