Compact size and lightweight design for easy portability. Built-in 500mAh rechargeable lithium battery with multi-circuit protection for long standby and working time. Features CSR8635 imported UK chip and latest Bluetooth 4.1 + EDR technology for superior signal transmission and ultra-low power consumption. Compatible with iOS and Android devices. Press the power button once to answer a call and press again to hang up. Equipped with a built-in high-quality anti-interference microphone and external windproof sponge for clear hands-free calling performance and high-fidelity o. Supports music playback control, volume adjustment, track navigation, playback/pause, and automatic redial functions for convenient operation. Includes mini USB charging interface for quick and easy charging. Charging voltage: 5V; charging time: approximately 3 hours. LED indicator lights solid red during charging and turns off when fully charged. Device cannot play music or answer calls while charging. Auto-reconnect with memory function: if the last paired device is within range, the headset will automatically re-pair when powered on. Suitable for use with full-face helmets, half-face helmets, off-road helmets, and flip-up helmets. Specifications: Material: Plastic Color: Black Bluetooth Version: 4.1 + EDR Supports: Stereo Music (A2DP) Frequency Range: 2.402GHz - 2.480GHz Transmission Range: 20-30 meters (varies by device) Microphone Transmission Distance: 1 meter Playback Time: Up to 15 hours Standby Time: Up to 240 hours Battery Type: 3.7V/500mAh Li-ion Waterproof Rating: IP45 Distance Between Left and Right Speakers: Approx. 43cm Speaker Wire Length: Approx. 17cm Speaker Diameter: Approx. 4.1cm Net Weight: 127g Note: - Fully charge the helmet headset (approximately 2 hours) before first use. - Do not use the earphone for music or calls while charging. Package Included: 1 x Helmet Bluetooth Headset 1 x USB Charging Cable 1 x User Manual 1 x Accessory Pack