This bracelet is made from eco-friendly organic silicone, skin-friendly, by imitating specific sound frequencies to remove mosquitoes, suitable for baby, kids and adults, good choice when sleeping, reading and camping,etc.   Features: Simple but stylish appearance, detachable and adjustable strap for your convenience.  Made from organic silicone material, soft and skin-friendly, safe non-toxic, can rest assured use.  By imitating the sounds that female mosquitoes hate, to achieve mosquito repellent effect.  Can not only wear on the wrist, but also wear round your neck.  Good waterproof dustproof performance, Protect the grade as IP65.  USB charging, convenient and fast, no need to replace the battery.  Lithium battery provide up to 150 hours of battery life per charge.  Suitable for baby, kids and adults, good choice when sleeping, reading and camping,etc.   Specifications: Strap Material: Silicone.  Color: White / Black / White + purple / Black + purple (optional).  Product Length: 29.6 cm / 11.7 in;  Product Weight: 45 g / 1.6 oz;  Packing Size: 10 * 6 * 4.5 cm / 3.9 * 2.4 * 1.8 in;  Charging Time: Approx. 30 minutes;  Battery Life: 150 h;   Package List:  1 * Bracelet;  1 * Charging Cable;  1 * Instruction Manual;  1 * Strap