- Omnidirectional electret microphone， DSP digital noise reduction-2. Receiver audio plug: Lightning-3. Compatible with Lightning interface phones and tablets, supporting system upgrades-4. Battery capacity: 60mAh; Charging time: 2 hours-5. Usage time: 3-4 hours-6. Material: ABS； Size: microphone 65 * 25 * 25mm, receiver 45 * 27 * 7mm; Weight: microphone 7.5g, receiver 4.5g