R16 1 For 1 Smart Wireless Self-Powered Hotel Home Electronic Call Doorbell(US Plug Black) Filter-eSATA & SATA & IDE Support multiple USB ports to

Support multiple USB ports to use at the same time

Contactless smart card reader

Product Features: Air Mouse

General Compatible with Samsung:  NP750XBE-X03CN

suitable for 8P/6P crystal head

R16 1 For 1 Smart Wireless Self-Powered Hotel Home Electronic Call Doorbell(US Plug Black) Filter-eSATA & SATA & IDE Support multiple USB ports to1. IP68 waterproof grade, can be exposed to the sun and rain 2. Waterproof, dustproof and shockproof, sturdy and beautiful body 3. The transmitter self generating design, no battery is required, energy saving and environmental protection 4. The transmitter can be pressed around, easy to use 5. 4 level volume adjustable, 58 songs can be replaced 6. Volume range: 0 150dB 7. Power supply mode: transmitter self generating design, receiver in line 8.