Product Name: Um-136FM Private Mode Bluetooth Speaker Portable Mini Wireless Mobile Phone Audio Outdoor Portable Footba Ll Speaker Wireless Speaker USB, TF Speaker Model NO.: UM-136FM Special Function: With Remote Control, Touch Control, Memory Card Support, Radio, USB Disk Support, Anti-magnetic, Alarm Clock Color: Black,Blue,White,Red SNR: <70dB Sound Channel: 2.0 Usage: Mobile Phone, Computer, Radio, Karaoke Speaker Material: Plastic Type: Bluetooth Wireless Speaker Trademark: HUMIT Origin: Shenzhen Product Description FEATURES:Type: Bluetooth SpeakerConnection method: Bluetooth connectionInterface type: USBBattery capacity: 1800Frequency response range: 100HZ-20KHZSignal to noise ratio: ≥75dBPower supply: built-in lithium batteryChannel: 2Playing time: 2 hoursExtended storage: 32GBBluetooth protocol: 4.1Number of speakers: 2Effective distance: 10 metersFunction: card, radioMode of operation: buttonPlay format MP3Support format: U diskSpeaker adjustment method: buttonHave radio function: yes