1, MOQ 100pcs 2, good amplifier 3, CE, ROHS, SEDEX tests 4, newest design ... , OEM and ODM are OK 1. No external power needed 2. Holds Apple's iPhone vertically and horizontally 3. No external power ... needed, 13 dB of volume amplified 4. Holds phone vertically and horizontally, functions well in hand-free mode ...