Brand Generic Model name Optimus Prime Colour Black,white,Blue ,purple Form factor In Ear Connectivity technology Wireless About this item Model: Transformers TF-T08 Bluetooth Version: V5.3 Speak unit: 13 mm Battery capacity: 33mAh*2 Usage Time：About 4 hours（Earphones） Charging Time: About 1.5 hour（Earphones） Frequency Range: 20H-20KHz Transmission Distance: 10M Related
