?Specification? Material: Metal + Plastic 4 Color: Black / Blue / Red / Green Support: NFC / AUX Wireless Version: V4.0 + EDR Profile Supported: A2DP / AVRCP / Hands Free Frequency: 2400-2483.5MHZ Operation Range: 10M Working Time: 10 Hours Standby Time: ?90 Hours Full Charge Time: 3-4 Hours Interface: USB Power Supply: USB Output Power: 6W SNR: ?75dB Sound Channel: 2 Playback Format: MP3 / WMA Frequency Response: 40Hz-20KHz Water Resistance: IPX4 Whether Support APP: Not Support Extended Storage: Not Support Support Format: USB Drive Battery Capacity: 1800mAh Built-in Lithium Battery Speaker: High Quality Internal Magnetic 3W x 2 Dimension: 170x66x66mm / 6.69''x2.60''x2.60'' (appr.) ?Feature? Brand New and high quality. ? Compact, delicate appearance, fashionable design. ? IPX4 waterproof, dustproof, anti-scratch, shockproof. ? 3D surround effect, offer you different music feeling. ? 1800mAh power bank can charge your phone or other device in emergency. ? NFC Technology (Near Field Communication / Only for Android) for easy and instant pairing. ? Suitable for you to listen to music in the car, at home, office, bedroom or even during shower time. ? Built-in microphone, enables use this Wireless Bluetooth Speaker as a speakerphone, thus you can enjoy hands-free calling. ? Bluetooth speaker 4.0 connects faster, more stable, compatible with all your Bluetooth-equipped devices, connection range up to 10 meters. ?Warm Reminder? - NFC Only for Android. - Do not soak in water. It only support water mist proof. ?Notice? Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.