Waterproof bluetooth speaker, Mini Sucker Shower Wireless Bluetooth Water proof Speaker With Hands Free Function,Mini Waterproof Bluetooth Speaker, Gadget Speaker Bluetooth. Bluetooth version: V3.0 Frequency range: 2.4GHz-2.48GHz Operating distance: up to 10m (free space) Battery: 3.7V/500mAh Talk/music playtime: 3.5 hours Charging time: 1 to 2 hours