Description:<br> Bluetooth-compatible 5.0 chip is used in this helmet headset, which has high-fidelity stereo sound effect; and it has a power display to remind the power situation and timely charging.<br> A hands-free call function in this helmet headset can really free your hands for safe riding; two 450mAh batteries are built-in to ensure standby and working time.<br> Made from ABS and electronic component material, the product is durable and lightweight.<br> The length of the product is 4.88 cm, the width is 4.88 cm.<br> It is very convenient for motorcycle driving, bicycle cycling, snowboarding, skiing, etc.<br> <br> Item Name: Helmet Headset<br> Material: ABS,Electronic Component<br> BT Version: 5.0<br> Frequency: 2.402GHz-2.480GHz<br> BT Distance: 10m-20m (Depending On the Environment Around the Device Such As Obstacles)<br> Microphone Transmission Distance: Less Than or Equal to 1m<br> Li-Ion Batteries: 2 x 3.7V 450mAh Batteries<br> Playtime: Less Than or Equal to 16 Hours<br> Charging Voltage: 5V<br> Charging Time: About 3 Hours<br> Standby Time: Less than or Equal to 720 Hours<br> BT Pairing Name: BT23<br> Features: Noise Reduction, Easy Operation, Wireless<br> Size Details: <br> 4.88cm x 4.88cm/1.92" x 1.92" (Approx.)<br> <br> Notes:<br> Due to the light and screen setting difference, the item's color may be slightly different from the pictures.<br> Please allow slight dimension difference due to different manual measurement.<br> <br> Package Includes:<br> 1 x Helmet Headset<br> 1 x Micro USB Charging Cable<br> 1 x User Manual