1----Suitable and comfortable for cats: The adjustable collar length of 92 mm and flexible pointer head of 41 degrees make it suitable for most cat sizes. At only 1 ounce, it is light enough for cats to wear even when tracking. 2----Reliable Safety: The interactive cat collar is made of selected TPU material that is soft, durable and washable. which is harmless to cats or other pets. Lightweight collar is comfortable to wear on kitten's neck. 3----Working Details: After 15 minutes under normal working conditions, the red lamp will automatically turn off and go into power saving mode. Up to 1 hour and 30 minutes of red light, the red light will turn on again automatically. 4----Rechargeable USB Battery: Compared with alkaline battery replacement, rechargeable batteries with micro USB charging ports are more convenient and environmentally friendly. Cats can play with this rechargeable collar for nearly 5 hours on a single 1 hour charge. 5----Free-handed Cat Toy: The light beam is integrated into the collar to keep the beam spot in front of cats whether they are jumping or running. Cats are always drawn to chase it, making it ideal for anyone who works from home and needs time to focus or relax. Features: Material: PC/TPC. Size: 92mm*92mm*38mm(adjustable). Weight: 55g Colour: Green