1Quality material makes it eco-friendly and durable to use 2Lightweight and compact styling is portable and convenient to carry 3Quick charging, it charges for 2 hours and can last for 4 hours 4The time of the transmission delay is short, which can give you wonderful using experience. 5Equipped with wireless receiver, wireless transmitter and built-in battery, which is convenient to use.Features:1. Quality material makes it eco-friendly and durable to use.2. Lightweight and compact styling is portable and convenient to carry.3. Quick charging, it charges for 2 hours and can last for 4 hours.4. The time of the transmission delay is short, which can give you wonderful using experience.5. Equipped with wireless receiver, wireless transmitter and built-in battery, which is convenient to use.Specification:Condition: 100% Brand NewMaterial: Metal + PlasticTransmission Delay: System Frequency Response: 20hz-20khzFrequency Range: 2.4ghz-2.483ghzPackage List:1 * Wireless Receiver1 * Wireless Transmitter1 * Transmission Line1 * Instruction Book Note: The product is built-in battery.