Portable lanyard, easy to carrydouble magnetic loudspeaker, can be connected by , stereo surroundSupport TF card and U disk playback, can also be used without Bluetooth Built-in sensitive microphone, smart and clear call AUX audio input, easy wired connection Concave bottom round button, anti-slip and sensitiveouble magnetic loudspeaker, can be connected by , stereo surround. Support TF card and U disk playback, can also be used without BluetoothBuilt-in sensitive microphone, smart and clear callAUX audio input, easy wired connectionConcave bottom round button, anti-slip and sensitivespecification:1. Bluetooth version: upport TF card and U disk playback, can also be used without Bluetooth Built-in sensitive microphone, smart and clear call AUX audio input, easy wired connection Concave bottom round button, anti-slip and sensitiveouble magnetic loudspeaker, can be connected by , stereo surround. Support TF card and U disk playback, can also be used without BluetoothBuilt-in sensitive microphone, smart and clear callAUX audio input, easy wired connectionConcave bottom round button, anti-slip and sensitivespecification:1. Bluetooth version: V5.upport TF card and U disk playback, can also be used without Bluetooth Built-in sensitive microphone, smart and clear call AUX audio input, easy wired connection Concave bottom round button, anti-slip and sensitiveouble magnetic loudspeaker, can be connected by , stereo surround. Support TF card and U disk playback, can also be used without BluetoothBuilt-in sensitive microphone, smart and clear callAUX audio input, easy wired connectionConcave bottom round button, anti-slip and sensitivespecification:1. Bluetooth version: V5.upport TF card and U disk playback, can also be used without Bluetooth Built-in sensitive microphone, smart and clear call AUX audio input, easy wired connection Concave bottom round button, anti-slip and sensitiveouble magnetic loudspeaker, can be connected by , stereo surround. Support TF card and U disk playback, can also be used without BluetoothBuilt-in sensitive microphone, smart and clear callAUX audio input, easy wired connectionConcave bottom round button, anti-slip and sensitivespecification:1. Bluetooth version: V5.upport TF card and U disk playback, can also be used without Bluetooth Built-in sensitive microphone, smart and clear call AUX audio input, easy wired connection Concave bottom round button, anti-slip and sensitiveouble magnetic loudspeaker, can be connected by , stereo surround. Support TF card and U disk playback, can also be used without BluetoothBuilt-in sensitive microphone, smart and clear callAUX audio input, easy wired connection Concave bottom round button, anti-slip and sensitiveouble magnetic loudspeaker, can be connected by , stereo surround. Support TF card and U disk playback, can also be used without BluetoothBuilt-in sensitive microphone, smart and clear callAUX audio input, easy wired connectionConcave bottom round button, anti-slip and sensitiveConcave bottom round button, anti-slip and sensitivespecification:1. Bluetooth version: 2. Speaker: 5W x23. Transmission distance: about 4. Frequency response: 100Hz-20KHz5. Signal to noise ratio: 6. Working voltage: 3.7V7. Charging voltage: DC5V8. Charging port: Micro USB9. Battery capacity: Strong10. Talk time: about  hours11. Music playback: about 12. Standby time: about days13. Charging time: about  few hours (different charger specifications time are different)14.USB input:15. Size: 80x80x192mm