ZEALOT S1 Portable Wireless Bluetooth Speakers Waterproof Mobile Power Bank, Microphone, Emergency Torchlight, FM Radio TF Card for Outdoor Riding Climbing Camping (Grey) Built-in Bluetooth Technology Works with Virtually any Bluetooth-Enabled Device (Smartphones, Tablets, PCs) Silicone protective sleeve ensure Waterproof and shockproof function Built-in 4000mAH battery, which can last for up to 10 hours on a single charge. This speaker can also be used as a power bank This is a multifunctional bluetooth speaker which has flashlight, wireless bluetooth music, FM, TF card, power bank functions Flashlight function