<p>Features:</p> <p>1. No lock hole design: it completely abandons the traditional key and lock, in the fully opened and closed by remote control, realized the real security.</p> <p>2. Extended antenna: stronger signal, safer and more responsive, more convenient to use.</p> <p>3. Add USB external power source function: Make sure the lock works when battery (not included) was dead.</p> <p>4. Three unlock modes optional: Remote control unlock (Additional purchase), indoor button unlock, phone APP unlock, unlocking is very convenient.</p> <p>5. Practical: Easy installation on all kind of doors, very convenient. This product brings you enough sense of security.</p> <p>Description:</p> <p>This product is durable in material, easy to use, and has various unlocking methods. </p> <p>Specifications:</p> <p>Material: Zinc alloy</p> <p>Frequency: 433mah</p> <p>Lock size: 15.5 * 8 * 3.5cm</p> <p>Controller size: 6 * 3 * 1cm</p> <p>Battery: 150mAh</p> <p>Package Included:</p> <p>1* Lock (without unlocking switch, Additional purchase)</p> <p>1* Lock Body Holder</p> <p>1* Lock Catch</p> <p>4* Remote Controller</p> <p>1* Bag of Mounting Screws</p> <p>1* USB Cable</p>