Features: The wireless speaker charger provides strong protection. Good anti-interference performance and high reliability. High working efficiency. Low operating temperature and long service life. 100-240V input range, meeting global usage standards. Good insulation performance and high dielectric strength. With short circuit, overload, and overvoltage protection functions. Specifications: Material: ABS Color: Black Input: 100-240V Option Type: Speaker Power Adapter with US Plug; Speaker Power Adapter with EU Plug; Speaker Power Adapter with UK Plug Compatible with Harman Onyx Studio 7: HKOS7BLKAM; Onyx Studio 6: HKOS6BLKAM, HKOS6BLUAM, HKOS6, HKOS6GKYAM, HKONYXS2BLKJK; Onyx Studio 5: HKOS5BLKAM, HKOS5BLUAM, HKOS5GRYAM; Onyx Studio 4: HKOS4BLKAM, HKOS4BLUAM, HKOS4WHTAM, HKOS4BLKBSG, HKOS4BLKEU, HKOS4WHTBSG, HKOS4BLUBSG; Onyx Studio 3: ONYXSTUDIO3R, HKONYXSTUDIO3BLKUS, ONYXSTUDIO3REDG1, ONYXSTUDIO3K, ONYXSTUDIO3BLUEG1, HKONYXSTUDIO3BLKAM; Onyx Studio 2: ONYXSTUDIO2BLKUS; Onyx Studio 1: HKONYXSTUDIOG1, HKONYXSTUDIOJN Note: Please allow 1-2 cm errors due to manual measurement. Make sure you do not mind before ordering. Due to differences between monitors, the picture may not reflect the actual color of the item. Package includes: 1 x Power Adapter