- Bluetooth 5.3; Chip: JL AC7066A-2. Material: ABS+silicone buttons; Size: 27 * 21 * 111mm; Weight: 106g-3. Battery capacity: 700mAh; Charging time: 2-3 hours-4. Usage time: Play MP3 for about 2.5 hours, receive audio for about 3.5 hours-5. Speaker diameter: 40m; power: 3W-6. Supports TF card and 3.5mm headphones-7. Frequency range: FM87Mhz-108Mhz AM520-1710Khz