Bottom Line:  The Star RX-SP4 Church Nursery Service Pager for Nursery Pager Systems features high quality at a low price! Pros:  Very strong vibration setting, extended range even between buildings, anti-walk-off feature, very sturdy casing, small and unobtrusive, clip is protected by cradle, long battery life. Cons:  Like most pagers, the RX-SP4 only comes in black. The Star RX-SP4 Service