- Reiko sports LED lycra armband for 5.5 in devices -This fully adjustable sports armband is ideal for listening to your music whilst out cycling, walking, jogging, or indoor, whilst exercise at the gym! It is made from a sturdy combination of water resistant, premium neoprene and flexible lycra -Led safety armband for a more enjoyable running experience -The latest technology for nighttime safety -Designed to bend and twist freely, whilst staying sweat free -Comfortable and lightweight, this armband can be worn on either arm