Features: 1. Utilizes advanced CSR 4.0+EDR Bluetooth technology for strong signal transmission and ultra-low power consumption, compatible with most Bluetooth devices. 2. Supports automatic answer function with option to switch to manual answering, ensuring safe and convenient hands-free calling. Built-in high-quality noise-reducing microphone enables clear voice pickup and easy call management. 3. High sound fidelity with controls for play/pause, volume adjustment, track navigation, and redial functions for simple operation. Specification: Connection Name: BT Bluetooth Version: V4.2+CSR (updated version, may differ slightly from manual) Transmission Distance: 10 meters (may vary due to environmental conditions and connected device) Bluetooth Pairing Distance: 20-30 meters (varies by device) Standby Time: 120 hours Play Time: 15 hours Charging Time: ≤1 hour Battery: 3.7V/500mAh lithium battery Microphone Range: ≤1 meter Frequency Range: 2402 MHz - 2480 MHz Product Features: Helmet Headset, Bluetooth Helmet Headset for Motorcycle, Motorcycle Bluetooth Headset, Headset for Helmet, Motorcycle Helmet Headset Package Includes: 1 x Motorcycle Helmet Headset 1 x Cable 1 x User Manual 1 x Microphone Cover 2 x Static Stickers