Recycled RPET polyester and bamboo. — Bluetooth version: 5. 1 + EDRCharging voltage: DC 5VRechargeable 300 mAh lithium batteryApproximate solar charge input: Max. 100 mAh/hourOperating time: 2 - 3h Operating range: up to 10 metresFrequency 280Hz-16KHzImpedance: 4ohmsPower: 3WSNR: >80dB Includes USB cable for charging. Instruction manual available in 6 languages: Spanish, English, French, Italian, German and Portuguese. Type-C Cable included. Presented individually in eco design box.