Material: ABS + PCBluetooth version: 5.1Connection range: up to 12 metresSpeaker diameter: 13 mmSpeaker resistance: 32hSpeaker sensitivity: 1153dBSpeaker frequency: 20Hz~20KHzSignal-to-noise ratio >70Earpiece weight approximately 3gBattery capacity: 30 mAhPlaying time: approx. 5 hoursTalking time: approx. 4 hoursCharging time: about 1 hourCase weight: approximately 35.5 gCase battery capacity: 300 mAhCase charging time: approximately 1 hourCase charging input: 5VStandby time: approximately 25 hoursCase size: 56x50x26.7mmCompatibility For Apple/Android devices with Bluetooth functionality