Features:Built-in 40mm 3W internal magnetic speaker, HiFi lossless sound quality, high and bass natural balance, bass surround.Using BT5.0 technology, stable signal, energy-saving, and power saving.Light and compact fuselage, one-hand grasp, easy to carry, suitable for outdoor travel.Built-in 1000mAh rechargeable battery, 6-12 hours playtime, lasting 72 hours after a full charge.High-quality ABS-made material, lightweight and portable, easy to use, convenient to take.Specification:Model: M1Material: ABSBT Version: 5.0Power: 3WPower Supply: DC 5V 1ABattery: 3.7V 1000mAhCharge Time: 4 hoursStandby Time: 72 hoursSNR: ≥80dBFrequency Response Range: 20Hz-20KHzColor: Pink/Green/White/Black (Optional)Item Size: approx.7.5*7.5*3.2cm / 2.95*2.95*1.26inPackage Size: approx. 9.5*8*3.6cm / 3.74*3.15*1.42inPackage Weight: approx. 140g / 4.94ozPackage List:1 * Speaker1 * USB Cable1 * User Manual