W-KING S20 Loudspeakers IPX6 Waterproof Bluetooth Speaker Portable NFC Bluetooth Speaker for Outdoors Shower Bicycle FM Radio Features: 1, Unique rugged square design. 2, IPX6 waterproof function makes it perfect for outdoor and bathing use. 3, Enjoy an impressive crystal clear sound quality and robust bass realized through 2 x 3W audio drivers and passive subwoofer. 4, Connect with Bluetooth-enabled device or just plug in with the 3.5mm audio cable to start your tunes. 5, Tap-to-pair with NFC technology for easy and instant connection (If your device has NFC function). 6, Built-in 2000mAh rechargeable battery enables 8-10 hours of playtime. 7, Small and lightweight, with a lanyard for easy on-the-go use. Specification: Model: S20 Bluetooth Handsfree: Yes Bluetooth Version: V4.0 Operating Range: 10m Total Power: 3W*2 Built-in Battery Capacity: 2000mAh Battery Type: Li-ion battery Music Playtime: 8-10 hours Power Supply: 3.7V DC Parameters: Channel: 1.0 Interface: 3.5mm, USB 2.0 Microphone: Yes SNR: 68dB Sensitivity: 80dB Frequency Response: 2.4GHz-2.48GHz Impedance: 4ohm FM Radio: Yes FM Frequency: FM78.8-FM106.1 Storage Card Type: TF Size: 10cm x 9cm x 5cm