Function: with SD/TF card slot/ Aux/ Phone call/8 LED lights Bluetooth: V5.0 Bluetooth protocol: HSP/HFP/A2DP/AVRCP Material: ABS+ Silicone+ fabric Transmission distance: 10m max Battery:3000mAh(18650) Charging port: USB C, DC 5V/2A Connection: Aux/ TF card/ bluetooth Speaker: 52mm/magnetic speaker, 10w*2 SNR: ≥80dB Working frequency: 100HZ－20KHZ Unit size: L 201* W 63.5*H 144.6mm Unit net weight: 930g Charging time: 3-4 hours, working time 3-11 hours